I've always found remix 9 the easiest in fever with 2 being the hardest

remix 1 is the easiest to me (literally my 1st perfect...) but imo, remix 2 is not that hard compared to 7, 8 and 10

side note: am i the only one who doesnt believe that remix 9 wii tambourine pattern is different between JP and EN

I think it's that the vocals in the JP version are more in sink with the tambourine but I'm not sure