ModDB, to my knowledge, does place these based on upvotes or most user joined per month or something along those lines.
still, my suggested placement is better.
people buy EA's over-hyped games and rage when they have no balance to them.
EDIT:
example, C&C 3
Hard Nod Steamroller AI, difficult, but not impossible to defeat, wont suggest a 1v1 with one if you dont do well vs a turtle AI.
Hard GDI steamroller AI, same thing...but spam AA or you WILL lose.
Hard Scrin Steamroller AI, impossible, rolls over you in seconds of game start and wins before you get a WF.