Quote Originally Posted by VortexMagus View Post
I run 30 ap version every time because there's a chance of having the SSR weapon/Eidolon drop there.

The standard (20 ap) version gives more of the feathers per AP though, so if you're close to buying a certain thing I think its fine to use that.
I haven't noticed any better drops for anything on standard, I only do standard if I'm close to rank up and don't have enough ap for expert.