United’s side cost far more to assemble and in addition to that, Pogba has been absolutely stinking in these big games for United, he’s completely crumbled under the pressure so I’d have been shocked if he’d made the difference anyway. Mourinho also had Mata in his squad, a player who helped LvG’s United side dominate Liverpool at Anfield.
Liverpool were missing Sane, and key attacking component and still saw fit to try and win the game!
As for Mourinho against City, it’s not even worth debating, we absolutely know he’ll go worth the same set up. He’s got better reason to be doing it against City than against Liverpool though.