Totally different games. They are both great, but for different reasons. Looks like you have owned a lot of games, but all of them pretty new. Go play something like a system 11 and decide if you like it. That's a better comparison. They are incredibly easy to learn how to play, devilishly hard to master. They don't have super deep rules, but mastering it is really really tough. Is that bad? I don't think so, its just different. TNA is very straight forward and easy to understand. The rules aren't all that deep. However, mastering it is really hard. There is a lot of risk to most of the shots, so game times are not super long. I have played probably 100 games on it at least, but I still dream about playing it more because I want to get past reactor 5.
Maiden is an awesome game. Its got some awesome shots, a new layout, and overall just feels good. I probably have about 25 or 30 games on it. I was seriously thinking about getting it till I heard DP was coming. BTW, Im not a big fan of the band, but the pin is that good I would consider owning it. Now I need to decide between the two.