Well, depends of course on your Windows Laptop. I had a Thinkpad X1 Carbon with no heat or noise issues at all. Now a Surface Pro 7 with also no heat issues. It's not the fastest around, but for a tablet really impressive (typical dev setup running Postgres in Docker, Goland, Webstorm with no problems).

Still I likely buy a M1 Air soon. Not because of the M1 CPU, but because it's almost half the price of a comparable Thinkpad. And I hate the bloatware shipped with basically every non-Microsoft Windows laptop.