Yeah, Tatsunoko vs. Capcom is definetely better than Marvel vs. Capcom!
Thats definetly OPINION. Not fact. Marvel vs capcom games have better rosters and more replay value judging by popular report since u can make teams of 3 in any order from 60 characters. Tastunoko vs capcom is okay. I recomend it though because marvel vs capcom 3 will have the exact mechanics for gameplay (3 attack buttons and 1 assist button) so you can get your practice in.