if you don't need the defense (who needs avoidance noawadays anyways eh?) Heroic last word has higher dps and more EH if you socket it with a blue gem. I'd probably go for the last word yay increased healing! TBH though you should try to get a 10man togc run going and go pick up the weapon off anub. the armor/gem in that one makes it BiS for a long long long long long long long time.
This exact question/thread was posted 2 days ago (few spots down in the thread list). My opinion is that they are very close but last word probably wins out just due to it being higher ilv. That, and I think the healing buff might be a lil underrated (still not great tho).