I like the Sparkle PV but it seemed a little cheap (not in the sexual sense) and a bit rushed too. Also she was trying to hard to be sexy, but that's probably not her fault its he-who-must-not-be-named's. Like, it looked like a PV that would be only included in a DVD and not an A-side, if that makes sense. ECSTASY, on the other hand was really well made and was naturally sexy, even though I tend to prefer Ayumi's PVs more than Kumi's (and her music for that matter).
Edit: Now that I think about it though, I give Kudos to Sparkle for having a deeper message though (
).