To disable mouse accel in budgie use Dconf editor
sudo eopkg it dconf-editor
Once you've got it installed, navigate to /org/gnome/desktop/peripherals/mouse/
In there you'll find and option accel-profile. Click on it, uncheck the default value button, underneath the custom value button will become available. Click on that and set it to flat.
Now just match your windows sens with your linux one. 😀