In the 3DS version of the game, the music certainly seems to have been reworked, or should i say, the mixing. It seems they went back to the original sound files for each mic and lowered / turned off the mic channels that were picking up reverb and ambiance. It's definitely the same recording, but now it sounds like it was recorded in a small studio.
I compered this:
To some of these game-play videos:
What are your thoughts on this?