For most games, I don't think the difference is between making a game playable or not. It's just something to be aware of if you are going to play more demanding games.
I did some benchmarking between the Z1 Extreme and the Z2 Go at various wattages. The Z2 Go is has four more GPU cores than the Z2 A so Rog Xbox Ally would not perform as well.
Legion Go S Z2 Go version is on sale at Best Buy for $499. I got an open box for $475, like new. The Z2 Go came with Windows but I installed Steam OS
Here are the benchmarks using the built in benchmarks for Black Myth Wukong, Cyberpunk 2077 and Shadow of the Tomb Raider. Run them all with the same settings, varying only the TDP (Simple Decky TDP)
Considering I paid $775 for the Z1 Extreme, I'm pretty sure I'm returning it and keeping the Z2 Go. Just can't justify $300 more for 4-9fps
Here are the results:
<<<<<Steam...