Testing by Ars Technica reveals that Valve's SteamOS offers improved gaming performance compared to Windows 11 on the Lenovo Legion Go S. The tests demonstrated higher frame rates when running games on SteamOS, Valve's Linux-based operating system designed for gaming. This suggests potential benefits for users prioritizing performance on handheld gaming devices or Steam Decks. The findings highlight the ongoing competition between operating systems in the gaming space and the potential for SteamOS to provide a more optimized experience for certain hardware configurations.