Also it has more versatility than the other two devices you mentioned
Huh?
I chose the Vamo because IMHO it offers the best of everything... price point, durable, VV, VW, different battery configuration "out of the box", atty resistance, battery charge, 1.2 ohm capability, 5 amp switch, and best of all... best user interface. It is the only device I know of, at any price, that you can perform all functions (besides the 5 click turn on and off) with a single press of one thumb, *while* being able to read the display.
The SS sounds appealing and I'm sure for many it IS, but let's face it... a device you use all day long, every day, will sooner or later start showing wear... even devices made out of stainless steel. And then you either live with it or wrap it with something cool looking. If a jwrap or similar is probably in your future anyway why spend the extra money on SS?
When I said I noticed wear on my chrome one it was exactly that... tiny scratches from being carried in the same pocket as my car keys or maybe some change, a bit of haziness around the buttons (because no one wears clean kid leather gloves all the time), a couple of dings from being dropped onto concrete a few times, etc. It's not like the chrome was flaking off or anything. From 10 feet away it would look just like a new one.