Bringing up console sales in a review thread about a game you don't even own...
Yeah, because everyone is going to rush out and spend $500 on a new X1X just for RDR2 hahaha.
That being said, as an owner of both a PS4 Pro and an X1X (and a switch, gaming PC, 3DS, Vita etc.) I chose to play the vastly superior version of Red Dead on my Xbox One X and I'm so glad I didn't have to settle for half the resolution with choppier frame rates on my Pro.
You don't even own the game, but if you ever do decide to buy it, enjoy it on your Pro... I'm sure it's still a great experience even if it doesn't look nearly as good.