Alright, this will be fairly quick since I don't enjoy pad rolling very much. I just end up wanting to listen to music and getting upset that there are so many pads to try!
Impressions before measurements (all compared to stock velour):
FocusPad - Roomy, comfy, very spacious, bass is slightly lacking, treble is more intense, great imaging.
FocusA - Not as roomy, really comfy, slightly less spacious/more intimate, great bass/maybe slightly more prominent due to...