Asside from a smaller area needed and smaller food items i treat my carpet just like my panthers. But they are way more shy then panthers at least from all i have heard and my short experience with mine( only had a few months) Not a chameleons that likes to be bothered that is for sure.
As for pigmys keeping them cool is a chore and worrie in the summer, as well is fining small food items some times. other then that i found them no different then other chamleeons.
I think the choice here is how much u want to spend and witch chameleon you like better.
as for care sheets check out these sites for caresheets.
www.chamleonjournals.com
www.adcham.com
this is my carpet Peanut he is a male carpet major he is around 6 months old