There's a reason why Steam Deck is leading the handheld race, and it was never about hardware

XDA Developers

Despite the Lenovo Legion Go 2 featuring AMD's powerful Ryzen Z2 Extreme SoC, the Steam Deck continues to dominate handheld gaming sales. The Steam Deck's success stems from first-mover advantage, Valve's ecosystem investments (SteamOS, Proton, Deck Verified), and competitive pricing rather than raw hardware performance. Valve established the Steam Deck as the de-facto reference platform for handheld PC gaming, making powerful competitors struggle to justify their premium prices.

The Legion Go 2 needs more than a Z2 Extreme to make me drop the Steam Deck

The Legion Go 2 is impressive, but the Steam Deck has become the industry standard

Valve won the ecosystem war long before Legion Go 2 arrived

Valve also made sure the Steam Deck remained the value king

It’s so ridiculous, how people always talk about specs… Getting a Steam Deck over other handhelds is mainly not about specs!!
It is about the company that produces it, which you support with your money by buying their product.
It is about the community around it.
It is about the maximum compatibility around it.
Specs on a Steam Deck are really not that important, as long as the device can run most games without huge performance issues.