Vascowear is not the least bit stain resistant whereas D-2 is to some degree but is still not considered to be a true stainless steel due to the chromium content.
Edge holding, Vascowear wins hands down bar none.
Vascowear is MUCH harder to work with than D-2, it will work harden if it gets too hot. D-2 grinds like butter, Vascowear is tougher to grind in the annealed state.
Vascowear is quite a bit more expensive than D-2 and is more difficult to heat treat. I send my blades to Texas Knifemakers Supply for heat treating and Vascowear or Cruwear is more expensive to have heat treated than any other steel they treat.
Although it is more expensive, is not "stainless", harder to work, and cost more to heat treat, in my humble opinion, it is worth going through all that for the finished product produced. I love the stuff.
I am somewhat biased as you can tell.
CLWilkins