I don't know the stats, but I would imagine Adrian's goals conceded per game is very similar if not worse. West Ham are a joke, it's not their goalkepeers fault. Yes, Hart has made errors leading to goals but he's also made big save after save, he's definitely been better than the pathetically overrated Adrian. If he wasn't Spanish, he'd be known as a second rate Peter Brezovan and he wouldn't even be playing in the Championship.
I think Fraser Forster has a claim for the keeper's spot, tbh.