Hm, I missed the "sold" in the poll question. Still, I think Civil War sold better. I think DC has lost a lot of readers over the course of Crisis, nearly including me. Around #5, I was pretty tired of the way things were going. #7 was more of the same. The huge fight with the Society was too chaotic and hectic. I know people were killed left and right, but I could barely recognize them...and when I did, most of the time I wouldn't have known who it was anyway. The last fight went on and on...predictably...but with one exception wasn't all that dramatic.
I felt the resolution between Bruce, Diana, and Clark was more or less forced. Without any explanation...save for one symbolic act by Diana...the three are all ok again. Maybe that's all it takes between true friends, but I would have expected there to be more.
On the other hand, Marvel's hit at least a three-bagger (oh, how I loathe baseball metaphors) with Civil War. It was surpisingly sparse on details about deaths with what were once major B list characters. The confrontation between Cap an SHIELD....amazingly well done. The expression on Cap's face was just amazing. That alone was worth half the price of admission (hey, it's an expensive book. I don't want to come off as being bought TOO cheaply).
Crisis was a good series, with great potential. Civil War is off to a great series, with the potential to be the story of the decade. Let's see if Marvel can actually pull it off.