Earlier this month on Phoronix I reviewed the Razer Blade 18 RZ09-0582 as the first laptop Razer is certifying for Linux use via Canonical's hardware certification program for Linux. It offered very nice performance with the Intel Core Ultra 9 290HX Plus and NVIDIA GeForce RTX 5090 graphics albeit costly with a configured price of $5399 USD. That review featured benchmarks on Ubuntu 26.04 LTS but for those wondering about the performance of Ubuntu against Windows 11 on this gaming/AI developer laptop, here are comparison benchmarks plus also tossing in the rolling-release CachyOS distribution.