Specifically, the switch uses the same chip as the nvidia shield TV, which supports 2ghz CPU/ 1ghz GPU. However, the shield:
Has a different thermal design
Isn't necessarily meant to consistently run at high speed. It will speed up under load and slow down when hot
Will always have power from an outlet
The switch is meant to offer consistent performance and battery life.
The switch does have some thermal room to spare
https://nintendoeverything.com/vide...with-switch-games-and-overheating-the-system/
I'm not sure Linux on switch has any throttling or other temperature protections. The switch's 67° C limit seems low compared to the 90-105 on desktop chips. Also on a small form factor device the limit is probably your hands.