"can't beat the speed of light", according to Terry Pratchett the speed of dark does so quite handily.
“Light thinks it travels faster than anything but it is wrong. No matter how fast light travels, it finds the darkness has always got there first, and is waiting for it.”
― Terry Pratchett, Reaper Man
edit: as per requested; There is far more to any system than just the OS or a single piece of software. Simply because both systems use the same core, the OS isn't a copy and paste. Additionally, the varied components result in very different results. tldr; Linux != steam OS despite being built on the same core.