LoTR is superior to ACDC. LoTR does have more going on and is the deeper game. There is much much more satisfying modes, tasks, mb's, etc...going on in LoTR. The only thing ACDC has going for itself over lotr is faster gameplay and quicker ball times. However, the quicker ball times is subjective; for example, if you get 8-12 songs deep in ACDC - your game is on the longer end. And its common to walk away from a long game of acdc with a feeling of not being 100% satisfied. I will admit that there are times in acdc that are very rewarding like a 3x loop jp, or target jp, or 3x song jp, or a 3x bonus jp; those are fairly rare scenarios. But In LoTR, there is so much to do that your usually rewarded with at least one piece of the pie nearly every game.

That all said; LoTR is a SINGLE player game and ACDC is more fun multiplayer. So take that as you will; ACDC may compliment a smaller collection better if your not the only person playing.