I haven't been to either, but I gotta be honest here - even though Burgers is much higher on my wishlist than Amneville, if I were to visit one of these two zoos with the sole purpose of seeing primates, I'd choose Amneville. Then again I haven't visited that many zoos yet, so I'm probably a bit more of a species-hunter than those who hundreds of zoos under their belt - as long as a huge collection doesn't compromise with the exhibit quality. I'd rather visit a zoo with 10 species in good exhibits than a zoo with 1 species in a state-of-the-art exhibit. (Unless it was one extremely rare species vs. 10 run-of-the-mill species)
Since I haven't visited either, I can't help but share a little bit of Pipaluk's feeling that there might be a slight Burgers bias. I'm in no doubt that Burgers would win no matter what because of its superior exhibits and husbandry, but let's imagine a parallel universe where Burgers only had its primate exhibits and nothing else. No Bush, no Desert, no Mangrove, no Safari etc. Would Burgers still get the same amount of votes?
Which leads me to... Are we supposed to vote for the primate exhibits/collections/husbandry in a vacuum? What I mean is, can you let the Rimba primate exhibits of Burgers decide your vote because you love the Rimba zone in general? Or do you have to ignore the non-primate parts of Rimba completely and imagine that Rimba only contained the primate exhibits and nothing else?