Maybe Mikey. They are the same height so I don´t think weight wold be a major issue here. Yea, I would likely go with Mikey(and I ****ing hate that ****).
At this stage of his career, Pacquiao has to be favored over anyone that doesn't wrestle, grapple, foul, or impose size over him. Lipinents pushed Mikey's nose 3 inches to the left, so I think Pacquiao has more than a good shot.
One thing is for sure—they would say that Manny dragged a small fighter up even though Mikey is bigger. Oh, and Team Pacquiao offered to fight him, but Mikey chose Spence (credit there).