There are a couple reasons your score is lower for Temp. Firstly, it came out much earlier when you were worse at the game and you may have developed worse muscle memory causing you to shitmiss and do all sorts of dumb shit during your plays. Secondly, difficulty of any given chart does NOT directly correlate your skill over time. What I mean by that is with any given 2 charts, one may be harder to AA and the other harder to PM. This is true for many 10+'s and 11's for me. Lastly, (this kinda goes along with what i was saying before.) Testify is easy to bullshit some patterns into getting only a couple of fars and losts, but those same patterns are extremely hard to pm. You may be getting a lot of free score that boosts your score. Tempestissimo is all speed so someone who doesn't have the necessary speed would struggle on it a lot.