A little late to the Bendis party, but GotG is pretty bad whereas as All-New X-Men is pretty amazing, despite both having little to terrible plotting and being filled with mostly 2-dimensional dialogue exchanges. The difference is that the exchanges between the original X-Men are actually entertaining and shed a lot of light on who they are and how they are adapting to being flung into our present. I can name a dozen great interactions (nothing tops Havok/Cyke bro hug). With GotG, I can't name a single interesting exchange. In fact, all I remember is that Rocket Raccoon has been reduced to shouting "I murdered you!" or something to that effect, and I think Iron Man slept with Gamora for some reason?
I was a huge fan of DnA's GotG and have been really disappointed with Bendis's version. If I didn't know the characters beforehand, I wouldn't even know what their powers are. Seriously, what does Angela do? Is she just a white-skinned stripper-ific version of Gamora (who ironically lost her skimpy outfit)? Gah, don't even get me started on fights where everyone is pretty much the same with no interesting use of pacing and powers. See early Uncanny X-Men for a primer on how to do fights (#112 and #113, X-Men vs. Magneto in a Volcano!).