This fight is different. IW is bloodlusted and will be doing her most devastating tactics.
What gives IW the edge is that WW doesn't know where she is at the start. So IW gets first attack. This may or may not prove fatal. If WW knows what Sue can do then she probably uses speed to become invisible herself (too fast for Sue to see) until she finds her.
Sue has needed help in the past when facing off against characters of Diana's stature, but I have never seen her go at it with the maliciousness and killer intent that she had when she took on the Malice persona (aside from her bout with Doom). On average, I'm giving this to Diana for lack of feats on Sue's part.