No I believe that when you upgrade it keeps all the relevant drivers so everything should work. If I remember correctly, that’s what sony suggests you should do as it makes life easier.
I’m too much of a perfectionist to do an upgrade, I like to start anew, but I can see why it would be the preferable choice for most people.
This is my first post from my TR2 btw Only took me a few hours to get everything sorted thanks to all the help on this site and some forward planning!!