I haven't compared apps with their iOS equivalents, but facebook for android isn't great. The android market app itself is bad.

Honestly, now that I think of it, I don't know if I would stand by my initial claim that they actually look bad. I may just have that impression because Android's performance is (again, in my opinion) very clunky and inconsistent. It may be that the general bad user experience I've had with Android phones has tainted my entire view of the ecosystem.