Williams has height and reach advantages but can be outboxed (Quintana I). So I'd say Mayweather by decision.
When have you ever seen Williams in a boring fight? He would force Mayweather to fight. This fight will never happen, but if it did it would be an entertaining fight.
I'm bucking popular opinion and saying PW. I've said since the Margo fight that PW has the physical tools and the style to give PBF fits.
Williams is a much better fighter than Baldo. Even if Mayweather made him look bad, it would be an entertaining fight. Mayweather's not going to be able to simply dodge all of Williams' punches and throw one punch at a time like he did against Baldo.
Agreed, on both counts. P-dub would make it exciting because he would throw a ton of shots and force PBF to react to that. I definitely could see Williams winning based on his length and activity, but PBF is smart, slick and a master technician. I have to give PBF the nod based on his skill and the first Quintana fight for Williams. It would be one heck of a battle.