No, in my opinion. Mayweather stylistically matches up far better. But Pacquiao is so much more classy - even with certain stylistic disadvantages - that he should get the job done anyway.
Volume punchers are good against counter punchers,however marga is way to slow and may would pick him apart easily.
I think no. Mayweather would pick him apart, slow down his workrte and make him look like poor, where as pac will get hit here and there but will still dominate.
Floyd "Fantasy Boy" Mayweather wins another hypothetical fight. (If only he treated you fans this good...)