To do:
Rewrite this and include stuff about the BPM limits.
In DropMix, all Drums cards are done with various samples that are sequenced into a .midi file with a .fusion file that tells the game what samples to put in which note parameter. In FUSER, the same is done, but in most songs the beat disc has all of the needed samples in a singular composite .mogg file. (Same goes for any song that has sequenced samples for Bass, Loop & Lead)
DropMix supports 5 loops playing at the same time, while FUSER only supports 4.
In a later update for FUSER, they added Hot Clips which allowed a 5th loop to be played over the mix by hovering over a song's instrument's icon and holding Shift (or whatever was the console equivalent).
Wild Cards in DropMix were the only ones that had transitions when the card is played on the game board, while in FUSER, all songs' loops had a individual transitions (labelled as Risers in-game) when hitting one of the Riser functions on the bottom-right of the user interface.
In DropMix, transitions were just samples that were sequenced up to a .midi file. While in FUSER, they were all had 4-bar audio files for each song's discs, sometimes with extra stuff added on at the after the transition.
Audio quality has been upgraded from 24kHz to 48kHz