I have a silver 2.1 and a vapor shark edition. I got the VS one when they first came out and I had issues with it & had to send it back a couple times. They replaced it with a new one which has been working well
I do prefer the VS' finish, how light it is, how much cheaper it was than the US made one, the larger screen and now ohm lock. Not sure how I feel about the new battery caps because I sliced my finger pretty nice & deep on em.
Owning both, I choose the VS VF every time, but if I didn't have the consistently flawless original too, I would've been without one each time I sent it back. I suspect/hope the VS ones are improving with time and my issues could've been because I got mine so early on. They were very good about returning, repairing & replacing it & sent me shipping labels.
Now I just can't wait for the SX which'll hopefully ship Monday... and again, I ordered early on.