The PS5 looks like 80s futuristic, like how we thought everything would look in the future. Which is not modern anymore and hasn't been in a very long time. It's not exactly ugly, it's just completely off the rails. It's more "what were they thinking?!" (in AVGN's voice)
I like the sleek, modern look of the XSX. And since we are talking looks here, I would have to go for that one. It's not the most practical design from a "where can i fit this thing by my TV" standpoint though. Usually media related devices are flat so that you can fit them in a media cabinet which has narrow shelves, or stack them. The XSX is too thick laying down to put anything on top of, and you can't put anything in front or behind as that would hurt the supply of fresh air. That's assuming it even fits in your media cabinet, it might not if the shelves are narrow enough. Standing up, you're pretty much limited to putting it on the floor. It's a great form factor for a desktop PC, as it takes up very little space on a desk. TV stands/media cabinets don't have much vertical space though.