spyken: I can get vg-10 stupid sharp... can get s60v sharp enough that it doesn't feel sharp with the thumb check but will shave and slice for days on end.
Given the choice of vg-10 I'd take ats-55 though, softer steel(more forgiving). I've had s60v chip on me once(my military was running a 30deg edge on the greys and steeled for 3 weeks straight).
In a blind test, or light cutting most of us won't notice a difference it's when you push the toy to see what it does that you notice. With the same edge(30deg edge, spydie whites, de-burr 5 strokes each side on 40deg greys), ats-55 deflaps 60 boxes... vg-10 150 boxes and 440v did 200-205... thats the numbers before they started to tear the cardboard. Those numbers are all on serrated spydies, 3" range.... was working at BK and doing 80-100 boxes a night.