On your gdtools link it’s only ~50 difference in OA. Where’d you get the hundreds from?
@tqFan shared a nice OA calc here
But I don’t know how to embed it. Looking at it I don’t think your OA difference makes much of a difference in damage. Crit chance goes from 35.1% (3780 OA) to 35.7% (3830 OA).
I suspect it’s the 15%WD to savagery that helps more.