S30V's biggest advantage is it is more corrosion resistant that just about any other steel, but I suspect VG-10 is second. It is supposed to be easier to sharpen and have better edge retention, but those factors are very dependant on the heat treat and resulting Rockwell hardness. At 56-58 Rc (as with Reeve knives) it is easier to sharpen than BG-42 (IMHO, with a side by side Mnandi vs. Sebenza "test"). I've been underwheled with the edge retention, at the lower Rc hardness, and it's not THAT much easier to sharpen. At an honest Rc of 60, S30V holds an edge for a long time, but sharpening is significantly more difficult. I really like VG-10, but man, once it's dull, stand by for some sharpmaker effort. They're all great steels, each having they're own merits and problems. This is why I still like ATS-34, overall, it's pretty impressive for using knives. Edge retention (again, IMHO) isn't quite as good as VG-10, but it comes back without much effort. Also, ATS-34 "feels sharp" whereas some S30V blades don't. I suspect that has more to do with edge geometry though. No matter what I do with 440C it never "feels sharp" to me so I tend to stay away from that one.