macOS 14.6.1 : Mouse behaviors - Logitech wired and Magic Mouse controlled by the same settings

I have been useing a wired Logitech USB mouse for a couple years and all of a sudden it decided to slow way down. Thinking this was a preferences issue. Settings > Mouse, cranked the speed up to Max. Still slower than I would like. Break out the magic mouse, and it moves the cursor across the screen by tapping it. So I have a standard USB mouse that is suddenly a slug and an Apple Magic Missle... Both of these devices are seemingly governed by a single preferences panel. Ostensibly stored in a .plist Searches on this site state the file is

~/Library/Preferences/.GlobalPreferences.plist

moving the file to

~/Users/brap/Desktop

to save it off and letting the OS re-create the file still yields the same result. Wired slug and bluetooth rocket. People have suggested that I should contact Logitech - that its a hardware issue and not software. Which might make sense if the devices behavior had not suddenly changed two days ago. I will be taking my mouse to the local box retail store to see if I can replicate the issue on one of their devices. Hopefully someone can give me an idea on what to try next that is not : back up everything and re-install from scratch. Do any of you know any more about the Preferences and plists? Is there something I am overlooking? Best.