IMO, the scoring system in XMen and TMNT is boring for competition. There is no variety and all scores cluster.
That being said, both games are great examples of the genre and I have nothing against the difficulty of them. It was really amazing and interesting seeing Winnebagel and Elrod break out of the pack of scores and WB eventually looping the game.
I think
Dungeon Magic will have more variety in scores than TMNT.