People keep claiming this, but my experience is that it's pretty similar. My mom's PC accidentally had only 4GB of RAM for the past 5 years (whoops), and we only noticed it a month ago because the cheap SSD was finally dying due to heavy swapping.
The kernel isn't that relevant compared to all the absolute garbage layered on top. The most efficient kernel is pointless when you have copilot and a UI built in React sucking down all your system resources.