Who would win between these two in a fifteen rounder?

I was all set to type "who cares", but then I remembered that I responded to the Carl Williams vs. Rahman thread just yesterday, I think, which is a matchup that isn't all that more appealing than this one here.

Had it taken place when it was scheduled to happen in Dec of '86, I likely would've favoured Bonecrusher to take a ten round decision and probably a close one at that.