Some people, myself included, prefer how Windows render fonts. Others prefer MacOS.
From what I recall the last time this came up on HN, MacOS tries to render true to the font as if in a professional work flow that ends with a physical product. Windows aims for on screen legibility as it's primary goal.
Also remember that most Windows machines have a much lower DPI screen that what comes with or is hooked up to a Mac, so what is being optimized for there is also different.
Honestly hooked up to my large 1440p screen, MacOS's font rendering isn't /that/ nice, it becomes a wash vs Windows, and on a 1080p laptop I'll take Windows don't rendering.