I picked both in SERIOUS hopes that A:ATF gets better as we get into the story more. I really just don't care all that much for Lynch. Who knows, maybe he'll suprise me and sway my opinion towards his writing but I seriously doubt it. (I secretly hope that IDW goes under and they have to sell Angel to Dark Horse, that way I could be on crossover cloud 9.)
Now, Buffy on the other hand, is so much more than I expected and I will continue buying these books as long as they stay canon. I love, love, love this continuation. It's funny too, because, Angel was the one that needed the continuity, not Buffy, but Buffy has played out better so far. (I know Angel is only one book in, but I just have a bad feeling about this whole thing...)