The reality is that United and City play different brands of football.
United have always played up and at em, hit them on the break, lots of crosses coming in the box, emotional football. City have played under Mancini, MP and no doubt even more so under Pep, controlled, cerebral football.
Pogba from what I have seen is an athletic, long range passer who will fit into their style well. But when I watched him playing for France who played more like us he was standing around a lot doing nowt. Doesn't seem like a Barca footballer to me. He's neither Xavi, Iniesta nor Busquets. The comaprisons with Yaya seem daft. Yaya keeps hold of the ball a la Busquets, passes like Xavi. He could and did play or Barca.
Pep didn't fancy him end of. He'll improve United. But they must be thinking how come their greatest ever manager cost them 100 million quid.