HeartpierceFollow

Just a quick question, is the proc worth disregarding other weapons with stats? I currently have Abomination Knuckles (MH) and have the choice of either Heartpierce or Scourgeborn Waraxe. Currently specced as Combat. I hit the dummies with both combinations of weapons but couldn't really make a proper judgement. Recount tells me I'm hitting harder with Heartpierce when blowing all CD's than the Waraxe however average sustained DPS hover around the same values. But I just can't shake off the idea that stats > proc in this particular case.

Constructive answers appreciated.