They both suck, Image, because I don't have to buy 20 issues from runs I don't care about to get the whole story. IDW gets a close second from Transformers & TMNT.
I can feel more sympathy towards Marvel's villains, namely Magneto, or Doc Ock. Where DC (since the New52, and its here to stay for now) has taken this away from some of their villains, like Mr. Freeze who now kidnapped Nora's frozen body because she was the first woman cryogenically frozen, and killed his own mother. Both companies over saturate the market with key characters, Wolverine, Spider-Man, Batman, & Superman are in atleast 4 books each month, when characters that should get more exposure cant even find it on a B-list team like the Defenders/Outsiders. I still enjoy books released by both companies, but these annual "shakes the foundation" crossover story arch's are getting extremely dull.