Just to show how subjective such comparisons are....
A few months ago I bought the V-Jays for my ipod touch, and was really impressed (for the price). Engaging sound with punchy, but not too prominent bass and unexpectedly clear vocals. My choice was partly as result of reading the earlier comparison review, where the V-Jays. came ahead of most of the pack, including the PX-100 II.
Today, I received my PX-100 IIi (with the extra remote control/mic), In comparison, the PX has a definite bass boost and treble droop.
Resulting in a warmer and, TBH, mushier sound. Overall the V-Jays won, and by quite a margin. Of course, the warmer PX's will be better at taming over bright recordings, so people sensitive to such such things may be swayed by that.
Regarding comfort, the V-Jays clamp the ears significantly more than the PXs, but that clamping doesn't seem to matter after a while, thankfully.
When moving around, the V-Jays stay on the head much better than the PXs. In either case, I'd rather have had more foam cushioning, but I guess that would have affected the sound.
Back on my main rig, In comparison to my Senn HD600s, which I consider to be very nice, mid-end, headphones, it was clear that the big boy was in a completely different and superior class to the two juniors. No chance of any giant killing going on here!
In conclusion, it might be early days yet, and maybe the PXs need some burn in or something, but I cannot understand how the PXs got to the top of the table a few posts above. I'm not not saying they're bad, just nothing special compared to the V-Jays.