[iironiic]

I'd say J'ai, CCCP, and Slashmaid are all just as comparably difficult where each file emphasizes a different skill, namely jacks, bursts, and speed/jumps respectively. It all boils down to one's skill set. Some people will argue that file A is easier than file B simply because of their skills.

Slashmaid is more appropriate in the 88 range. It's really difficult to compare a very short bursty file (grind2), a file that's pretty much simple except for a few parts (La Campanella), or a file emphasizing a lesser amount of skill as a whole (pretty much the rest of the 87s) to Slashmaid.