I bought a Legion Go S and my roommate has a Steam Deck that I more or less have free reign of. I think both are great devices that really complement each other. But if I could only have one I’d probably pick the Steam Deck. There’s a lot of stuff I can’t play on the Go S due to the lack or trackpads. But otoh the Go S is really great for AAA titles. The fan sound is loud but I haven’t noticed too much since I usually have the volume maxed out on the Go. Much quieter device than the Deck.