I would actually like someone who prefers Rollins to Reigns to talk about why they do so. I am not the biggest fan of Roman on this board, but to me, his offense is more snug and realistic than Rollins, he does not constantly take you out of matches with terrible expressions and spotty selling the way Rollins does, and while Seth has a bigger moveset, I don't get the sense that he knows how to time and structure it cogently into the match. He can literally do 3 top rope dives 10 seconds after selling his leg like it is broken.
And while Roman has often been given terrible material on the mic to work with, as a promo he still blows away Seth.