I could watch Messi a few times and know he was better than Giroud. Sometimes you just know when a players good. I've watched Lucas much more than Wanyama, but I still know Wanyama is hands down the better player. You get my point?
Plus, I don't really love Hart, yeah he can be amazing, but not often enough. Just wait and see, think you'll be happy.
Ok, I'll take your point but I'll reserve judgement until he's played a number of games for us. I won't write him off if he has a couple of bad games but I won't rate him as a world beater after a few good performances either.