Actually, the code for these two legacies is shockingly similar. Shocking, I say. Cut and paste, is there anything you can't do? :)

The following applies to both legacies but I'll just use Dance for clarity of examples. On one hand, a character who dodges well has the best chance to dodge when they'd otherwise fail because of Dance. On the other hand, a character who dodges like ass has a smaller chance to salvage the dodge because of Dance, but they're also going to get more chances for that to happen because they dodge like ass.

So in a sense, you could argue that it's better for the first guy because it does help him more, but you could also argue that it's better for the second guy because it brings him up from ass to okay.