To the untrained ear, it may seem like tsuu only has one vs song, but it's actually slightly pitched and tuned based on the win count.
Breakers has a system where the side of the cabinet that has a win streak will have slightly lower defense for each win. Puyo Tsuu does something similar, but it picks a note in the song to pitch up or down, depending on the win count, and how much of a streak is going on.
Checkmate jonkers

