Quite a massive overestimate for Berlin there
Not really. It has World of Birds, the Pheasantry (which is massive in its own right) and a few other exhibits scattered around the zoo.
Anyway, those are the species listed on ZTL, which I all checked individually to see if at least some of their range coincided with Asia. I did actually spend over 3 hours on the birds alone...
I applied exactly the same criteria to both Chester and Berlin.
Chester
Mammals: 29
Birds: 46
Herps: 24
Fishes: 25*
Berlin:
Mammals: 35
Birds: 55
Herps: 14
Fishes: 26*
Where have you got these figures from?
I'm surprised at those low fish totals. Especially for Berlin I'd have expected a lot more than that, even if only counting freshwater species.
I agree. I don't think it even says anywhere in the rules (and I my be wrong) that saltwater fish are excluded. If that is the case then Berlin probably has more different species than all other European zoos combined (joking btw, but point is, it has a lot more than Chester).
Keep in mind also that many of the species are potentially off-show, although I think all of the mammals in both zoos are on-show... perhaps with the exception of Javan mongoose in Chester. Not that it matters much, since most people won't be voting on the basis of the number of fish in either.
As for enclosures...
It is a tough one, but having been to both zoos relatively recently (Chester 2018 Berlin 2017), I think I can give a relatively balanced examination (of sorts).
Chester
As you enter, you immediately see the
elephant exhibit. Now this enclosure is good in landscaping, with a strange looking waterfall and a smallish pool, but the exhibit is noticeably too small. Given the number of animals they have, they certainly need more space.
Then you have the new
Asiatic lion exhibit. It is an all right exhibit - certainly not as good as others Chester has. The indoor exhibit is smallish and has a cart randomly placed in the middle (India isn't underdeveloped??), and is not very suitable to the lions. It also appears that a species of mongoose will use that indoor enclosure as their enclosure, so not sure how that is going to work, but hopefully they won't be in there at the same time as the lions

. The outdoor exhibit is really rather plain. It looks kinda drab and run-down, a bit like a rubbish-dumping site. However, they are growing plants so soon the exhibit will hopefully burst into life!
There is also a decent exhibit for
Red pandas, which is strangely obstructed by a fence despite the minimal danger imposed by the exhibited species to the humans watching them

but otherwise it is well planted and nice-looking.
Now we move on to the
Greater one-horned rhinos. This exhibit is rather meh. It looks all right and has a decent amount of space, but there is room for improvement. It is nicely landscaped though.
Next, we have Islands. I have spent hours poring over the plans and designs and architectural drawings, but I cannot understand a few things about it. Firstly, why the warty pig and banteng enclosures are so small, given the wealth of space for visitors. Secondly, the purpose of the boat ride - it doesn't actually offer a better view of the exhibits.
However, most of the exhibits are well-done, with some being outstanding. For example, the
sun bear and binturong is very nice and spacious. It would be outstanding if it had slightly more greenery and foliage. Due to Chester's position on the globe, it is hard to grow such foliage in the open air, but the lack of thick vegetation leaves somewhat strange tree trunks with lianas curled around them standing by themselves in the middle.
The
Sumatran tiger exhibit is large and looks very nice, covered in vivid greenery. It isn't stand-out or amazing, but it is good and nice to look at, though not perfectly suited to the tigers.
The Visayan warty pig exhibit doesn't look nice, but nor does their wild habitat, so it would actually be a great enclosure if it was larger. However, regrettably, having looked at the plans and the plots of land bought by Chester, they could easily have made it larger, so I am somewhat puzzled by this.
The same goes for the
bantengs. Chester holds a small herd, yet the exhibit is hardly 300 m2 in area. The substrate is nice and soft, and well suited and apart from size the exhibit is very nice.
The orangutans (as far as I know) as still housed in
Realm of the Red Ape, which is nice, but a bit outdated. They have a large outdoor enclosure, perhaps slightly larger than Berlin's and a nicely done indoor enclosure, which is significantly better than Berlin's.
Lastly, Tropical Realm has a few bird species like
Visayan and Greater hornbills, housed in decent aviaries pressed against the wall.
In conclusion, Chester's exhibits are nice and well planted (though not enough in the case of the tigers, sun bears and lions) and especially aesthetically pleasing. However, some need to be slightly larger and more suited to the animals in question (indoor lion enclosure/ future mongoose enclosure, warty pigs, bantengs…).
Berlin
Starting at the L
öwentor (Lion gate), the first thing you see is the exhibit for
Siberian ibex. This exhibit is probably one of the best mountain exhibits in Europe (probably after Prague's Barbary macaque exhibit). It consists of a very tall mountain with steep walls allowing the ibex to climb as they would in the wild.
Next, you have the
Himalayan tahrs, This exhibit could be larger, but, similarly to the ibex, simulates the mountainous environment relatively well. I think this enclosure needs improvement however - it looks drab and small.
From memory, there is then a large area for eagles and vultures I believe. The
griffon vulture exhibit is smallish but well landscaped generally. The
golden eagle exhibit is very large and allows them lots of space to fly. They also have a large rocky area at the end of their exhibit.
Then there is a large exhibit for
Greater one-horned rhinos shares with Lowland tapirs. The have a large but 60s-looking indoor area, which doesn't look very nice. However, the actual outdoor exhibit is large and nice from memory.
Then, there is a farm and to the right is
World of Birds. It is truly massive and I
really liked it when I went. It has areas that are split geographically, and the exhibits are generally large-ish and glass-fronted, allowing easy viewing into the enclosure. They are well-planted and spacious generally.
After that, we have the
pheasantry, which is in essence the longest row of bird exhibits I have ever seen. Every exhibit is large but not immense, with not too much height. Every exhibit is well planted and well-done.
Then there is the
polar bear exhibit. It really isn't that great. It has a smallish land area and a large green pool which goes around the exhibit. Although the separation area isn't bad at all, I don't like it, especially since polar bears are one of the zoo animals that need the most space. I sincerely hope it gets renovated soon.
The
Asiatic black bear exhibit was built at approximately the same time as the polar bears I think, but has aged better imo. It is of an acceptable size and has good climbing options including quite a large rocky mound in the corner.
You then pass an enclosure for
Bornean bearded pigs, which is quite good and has a decent amount of space. It has soft substrate for digging in and a small pool.
Then, you have the
Pandas. Now this is one of the better panda complexes in Europe (having seen Pairi Daiza, Beauval, Edinburgh, Madrid and Vienna). There are four enclosures in total, 2 indoor, 2 outdoor, one of each for the female and the male. The exhibits are really quite large, around the same size or slightly larger than Vienna's area for their pair. The indoor exhibits are also quite large, at around 1000 m2 each.
The
Persian fallow deer exhibit is also nice, with a very large area devoted to breeding them. It is basically just a massive grassy field.
Then there are
water buffalo and
gaur, both of which have exhibits similar to those at Paris Menagerie, just bigger. Rather plain, not aesthetically pleasing, but they do the job. The one thing that surprised me was just how deep the water buffalo pool was (they could fully submerge easily).
The only Asian animals on show the other side of the road are
Przewalski's horses, who have a nice a spacious enclosure.
Then, you have the
Hamadryas baboons, who have a very nice mountainous area a bit like that of San Diego but less flashy and older. It is well-suited to the troop.
Then you have the
orangutans, who have quite a large outdoor exhibit, but whose indoor exhibit is not at all aesthetically pleasing. It is reminiscent of 60s buildings, with low ceilings, small viewing windows and tiled walls.
Then, there is the Aquarium. I know that everyone on here probably knows a great deal about this area of the zoo due to its fame, but anyway, here goes. The Aquarium is a rather uniform bulding, with an immense number of fish aquaria, in very nice exhibits. The terrarium in the same building is equally outstanding, and there is also an entire hall devoted to insects. I haven't finished calculating how many Asian fish species there are in the aquarium but I do know that
it exceeds 300.
And finally, we have the
Asian elephant area. It is significantly larger than Chester's with a good amount of space. The indoor exhibit however is less good with an inevitable smell, a pretty small area, and surprisingly easy human-elephant interaction...
Anyway, in conclusion, Berlin has generally good exhibits, with a few very good ones and a few not so good ones.
In conclusion for both, I think that Chester's enclosures are only just better than those of Berlin due to some space shortages in certain enclosures, strange decisions and under-planting. However, Berlin has one or two poor enclosures and a few very good ones. It also seems to have more of a focus on birds due to the two massive complexes while still keeping a large mammal collection. As
@FunkyGibbon mentioned earlier, Berlin has no geographical area groupings apart from a Polar area in the North-Eastern part of the zoo, whereas Chester does (although there are Asian exhibits scattered around the zoo apart from that).
In terms of species, Berlin does defeat Chester significantly. The Aquarium has at least 300 species of Asian fish and around 30 species f Asian insect, going by my notes. The mammal list is more impressive and spread around the continent, whereas Chester has no mammal species that can be found in the Northern half of Asia. Though Chester defeats Berlin slimly in terms of enclosures, I think that Berlin has more to offer due to its bird collection and breadth.
Finally, I would like to touch on conservation efforts.
Berlin
Zoo Berlin supports
two-thirds of all international endangered species programmes worldwide.
It also holds the international studbooks for the following species:
Edwards’s pheasant, Indian bison, pileated gibbon, Persian leopard, rusty-spotted cat, sloth bear, Indian rhinoceros.
As well as the European studbooks for the following species:
Visayan spotted deer, Sichuan takin
And has started and continues to play a massive part in these endangered animal programmes:
Barded vulture,Visayan hornbill, Sumatran orangutan, polar bear, Asian elephant, Przewalski’s horse and Persian fallow deer
Chester
Participates in programmes for the following species:
Malaysian elephants, Indonesian songbirds, Painted terrapins, Javan warty pig, Philippine cockatoo, Bawean deer, Sumatran rhinos and Orangutans.
I couldn't find which studbooks Chester holds.
Anyway, having combined all of these factors and weighed them up, I am voting Berlin 2-1.