If looked at purely in terms of carnivora and obligate carnivorous mammals kept then I think it is clear that ZSEA have the stronger hand and that Whitley are lacking.
You've actually underestimated the number of carnivoran species held at the various Whitley collections by a fair amount - it will be interesting to see whether this influences your opinion on this matter:
Paignton
Asiatic lion (Panthera leo persica)
Maned Wolf (Chrysocyon brachyurus)
Meerkat (Suricata suricatta)
Nepalese red panda (Ailurus fulgens)
South African cheetah (Acinonyx jubatus jubatus)
South American coati (Nasua nasua)
Sumatran tiger (Panthera tigris sumatrae)
Living Coasts
South American fur seal (Arctocephalus australis)
Asian small-clawed otter (Aonyx cinerea)
Newquay
Asian small-clawed otter (Aonyx cinerea)
Carpathian lynx (Lynx lynx carpathicus)
Common Cusimanse (Crossarchus obscurus)
Fishing cat (Prionailurus viverrinus)
Non-subspecific Lion (Panthera leo)
Meerkat (Suricata suricatta)
Nepalese red panda (Ailurus fulgens)
Northern Narrow-striped boky (Mungotictis decemlineata decemlineata)
Owston's banded palm civet (Chrotogale owstoni)
Yellow mongoose (Cynictis penicillata)
So this comes to:
Felidae - 5 taxa
Canidae - 1 taxon
Herpestidae - 3 taxa
Viverridae - 1 taxon
Eupleridae - 1 taxon
Ailuridae - 1 taxon
Mustelidae - 1 taxon
Procyonidae - 1 taxon
Otariidae - 1 taxon
...or 15 species, of which one (Owston's Civet) is a highly unusual and noteworthy taxon.
Conservation ouput
Whitley
Ex-situ
Critically endangered: Sumatran tiger.
Endangered : Asiatic lion, red panda.
Vulnerable: Fishing cat, Asian short claw otter.
Near threatened: 0.
Total: 5 species and subspecies of conservation concern.
In-Situ:
The Whitley trust for nature funds and supports in-situ conservation efforts all over the world and is literally a lifeline for many of these. Current conservation projects involving carnivores involve Ethiopian wolves, Amur tiger, jaguar, puma, spectacled bear, Andean mountain cat, Eurasian brown bear, Eurasian wolf, Asiatic leopard, dhole, fossa.
You have also omitted a major point in this regard too - Newquay is one of the keystone members of the ex-situ breeding programme for Owston's Civet *
and* is heavily involved in the in-situ breeding centres and rescue facilities for the species over in Vietnam - and I would tend to argue that this taxon is the species in most need of conservation attention of *any* of the carnivore taxa which Whitley is involved with.