Both really good games, but be aware that if you are going for points (trying to win in any competition or high score) IJ boils down to this: Lock 3 balls -> play multiball and go for Super Jackpots. None of the modes matter, even though there are a lot of them and they are cool.

That's probably a key difference - I play in multiple leagues and we set the games up pretty hard with no extra balls. In league you better get a good score on 3 balls or that's it, so you really can't afford to go for the final wizard mode. In a league scenario there is only one way to play IJ, and it gets very repetitive. If you can get over trying to get the best score on every game, it's much more fun. But it's also fun to do well in league, so my 'practice' games I still tend to play with the same goal as in league.