The F2 version enables one to directly call scripts by e.g. issuing sh myscriptfrompath.sh. Or start a program within a terminal: st -e top. The F3 version wouldn’t accept these.
My usage is 95% of the time F3 - and I am a sw engineer. So very specific reasons.
I am really glad you liked it and prompted your question. I was playing for hours until I simply dragged away the categories 😅😃!! Now it is preserved :)