The difference is Chengdu Panda Breadding center is for panda research and protection (like a zoo), Bifengxia offer good care and natural living environment for the panda (like a bread ). There are more than 60 pandas in Bifengxia now. There is the only panda museum in Chengdu Breading Center. Both offer photograph service with pandas, but very expensive. Bifeng Xia is 150km from the city center, whicle Chengdu Breading center can be reached by city bus. You can see very little panda baby in Chengdu, in wooden panda housr or in incubator. Hope this helps a little.