I think MGRR is weirder. I can at least see how Caesar might fool someone into thinking he's not a criticism of their ideology (helps that I have a close friend who's leftist but thinks Caesar is preferable to the NCR an House).
But I can't IMAGINE looking at fucking Senator Armstrong being like "literally me" and not realizing he's a parody of your shitty ideology.
I always end out going Yes Man cause I can fucking solo all thee armies in their entirety at once without using a stimpak by endgame. I decide who lives and who dies in the wasteland. Stands to reason that I'm in fucking charge.
It's by far the least satisfying playthrough. When I did a Legion playthrough so I could see everything I made my headcannon to be that after I usurped Caesar I decreed that the Legion Be Normal. Basically same results as Yes Man but with probably an awkward internal civil war thing after and no robots.