If you want / like a mini saw get the S110V.
If you like a polished edge push cutter
( Did I mention I prefer this ) then go for the C20V (M390 same thing).
The S110V isn't difficult to sharpen, Crystolon ( Silicon Carbide ) will do it, Shapton Glass will to (even to a mirror edge) . . . I still prefer diamonds for S110V.
The problem lies in keeping it whittling sharp; it drops off to just an aggressive working edge, that won't make me grin, too fast for my taste.
C20V keeps that silly sharp edge longer but in the long run won't cut rope and fibrous stuff quite as long as S110V.
Of course this all depends on the heat treat and tempering and care at the manufacture in sharpening. I have had S110V that simply would not do anything better than my M390 (C20V) but that was a rare exception.
The M390 that cut circles around the one example of S110V was my Ritter Griptillian.
The sucky S110V was a Manix LW and yes I sharpened it many, many, many times toothy and polished.
I have several other Spydercos in S110V and they have proved to be good.
(((((I still like C20V (M390) better, much better in fact, though the blue scales / handles on those S110V Spydercos are too cool / I like them very much ))))).
Personally I couldn't care less about stainless, I find that the alloys I come to like the best generally tend to tarnish or even rust and or patina. That said the C20V and the S110V are plenty
stainless enough; no problem there.
