when you say mini grip g10 are you referring to the 556-1? or a custom from their site?
The 556-1 has a 20CV blade and Im not too sure how well that will hold up to "extremely abrasive materials" such as dry wall.
If I was going to be using a blade on drywall I would go with D2 or M4 tool steel. Both of which are available through the custom build.
That said I'd take M4 over D2.
The North Fork uses S30V which isn't the best of contenders towards "extremely abrasive materials" either. Along with the Blade profile/grind designed for skinning. I would think the S30V would suffer micro chipping/fracturing w/ extremely abrasive materials.
Again, I would highly recommend M4 or D2 tool steels.
CPM-M4 is one of the stongest/toughest/most edge retentive super steels available and can take serious abuse.
I think you'd be much happier with D2 than 20cv or s30v. I think you'd be extremely happy with M4 over D2.
*Edit*
Options
-custom mini grip in m4 or d2 / G10 $190-$205
-710 D2 / G10 $150
-275 D2 / G10 $180
-810 M4 / G10 $180
And at the very high end is the
-908bk-1501 M4 / Carbon Fiber $250
I own a a fixed version of the 275 and the 908bk-1501.
The 908bk-1501 is one of my favorite knives I own and easily the most "high abuse" folder Iv ever personally held. So solid.
comes extremely sharp as well

nicked myself while oiling the blade