The problem you'll have is not necesarily the base, it's what you are sliding on to.
Any grind base/ dura base/ whatever is made of "a" material that is resistant to wear, but will take knocks (and chunks out of it) rather than the core or top desk itself.
What this means is on some slider types, you can "scratch" in to the grind base, whatever is on the slider. Seriously- go see a park with yellow-topped sliders, all the locals will have a yellow tinge to their base. Blue? You get blue.
So because of that, you can never compare one board with another, as on paper they all do pretty much the same thing, but go scratch them up on a roughly finished a-frame, and however silky smooth it was the first time, it might not be next.
Best thing to do is talk to people who are riding on the obstacles you want to, and see how well their boards have worn. The colour (if there is one) of obstacles might tell you that whatever the theory behind the base material, actually, you just gotta deal with an ever increasing grip problem.
For what it's worth? OBrien grind bases are awesome