The green tree pythons are a lot more variable in color than their South American counterparts and disposition is actually quite similar imho. The majority of them are quite docile as adults, almost all are feisty as neonates. GTP neonates are about 1/5 the size of an emmy neo though so are defensive a bit longer than baby emmys. Stay away from the Biak locale type and your chance of having a very nice adult gtp is quite good.
As far as husbandry, I'm very predjudiced and believe that the gtps are easier. Their metabolism is higher and they seem to be quite a bit more tolerant of occasional husbandry errors. Regurge syndrome is practically unheard of with gtps.
Setup is virtually the same for both species so no difference there. Size is fairly comparable with the Emmys generally a bit larger than the gtps as mature adults. C. Maynard
16.26.16 Morelia viridis