Forrest by UD. Very skillful fighter, tall for the weight (obviously not like Williams but tall) with very solid fundamentals and good ring IQ. I think Williams new approach (after the loss to Quintana) has sort of being doubling the jab and then shoot the straight left and right hook which I don't think is enough to offset Forrest. While I think Forrest's compact and accurate punches would do the trick. I understand Williams last two fights have lasted less than a round each therefor not being able to show what he's really about, so not even I can take my argument 100%. But that's the best I've seen from Williams and what I have to base my judgement on. Like in most cases it wont be until later on after being able to compare both fighters entire career's and fight style that we can make a still speculative but better comparison.