Well AUS8a kind of sucks at least in my head. But the proof is in the pudding as they say. I don't know how or why this 8a blade steel would be any different than any other even with the 420 on either side but I'll tell ya this Hatamoto is about as sharp as any knife I have ever owned. Go figure. As for the VG steels I think VG1 vs VG10 I think one grade has more vanadium than the other. AUS8a not best and not the worst but definetly not a 400 dollar knife steel. Knife kicks ass though. keepem sharp