They definitely each have their own strengths and weaknesses, if I had to pick a winner, I’m going with Steam Deck, you just can’t compete with their controller API and the Deck’s assortment of input options; that alone makes everything else obsolete.
Raw horsepower(Rog v Deck) is a meaningless metric; Using the Rog is like driving a 911 without tires, just rims; you literally can’t control it.
You know, I haven’t done split in a while, but I remember getting so used to it and just lying on the couch with one in each hand and feeling so at ease.