Whitley, being the studbook holder for Sulawesi crested macaques, of course have a large focus on these and support Tangkoko forest, a large tract of rainforest in Sulawesi, one of the last strongholds of this species, as well as also supporting the other species found in this area, namely the Moor, Booted, Tonkean and Heck's macaques. These species are all either, vulnerable, endangered or critically endangered.
They also promote a more sustainable method or farming palm oil in South-East Asia and support Omo forest in Nigeria (100km from Lagos), indirectly helping native guenon and colobus populations, though the main focus of the project are forest elephants.
Having seen what both had to offer in this regard, and given I personally find the conservation aspect of a zoo very important since it is one of, if not the, main objective of a modern zoo, I reckon Jersey earns a draw and perhaps even a slim win.
The species list, while I personally find it relatively unimportant unless there is a clear winner (which there was in this case), rocked the tie in WPT's favour. However, both had uncommon species and Jersey had arguably the better species, with important (breeding) populations of Sumatran orangutans, Western lowland gorillas and Black lion tamarins as well as Aye ayes. Therefore this was a rather shady win for Paignton. However, in terms of enclosures, Jersey's consistent excellence thinly won it for me, and the last Diana monkey enclosure photo almost tipped it back in favour of WPT, but not quite, making the score a slightly favourable to Paignton 1-1.
The conservation efforts seemed more engrained in Jersey and it seemed to be more a part of the zoo than in WPT. Furthermore, they have sustained breeding groups of several primate species for 40 years or more, allowing a more consistent and sustained breeding population, doing more to boost captive numbers. It is also important to note that primates are a large part of Jersey's establishment and therefore of Jersey's conservation programmes, so there is a definite focus that we I do not see so much in Paignton. In conclusion, I think I am going to vote 2-1 in favour of Jersey, of course keeping an eye out for any extra information that could change my vote.