custimizability: This catagory goes to ZT2. Seriously, your able to adjust the landscape, the Biome, the gate entrance, and pretty much everything else. Wheras in JPOG, the only thnig you can customize si the Island itself.
Animal selection: Again, the award goes to ZT2. with well ove r100 animals to chose from, including MEGATHERIUM and DEINOSUCHUS. In comparison, there's only 20 or so dinosaurs to chose from ni JPOG.
Guests. So let's face it. ZT's guests are SO ANNOYING! they're little gremlins!

realism: Do I really have to explain? JPOG FTW!
Climate: In JPOG, the climate's always changeing, gonig from rainy to heatwave to twisters, which always makes you change your park layout and adds a strategic layer to the game. IIn comparison, ZT2 has the sun gonig up and down, but that's it. JPOG FTW!
So, the tallies are: ZT2= 2 points
JPOG= 3 poiints.
So overall, I'd rate JPOG as the better game...