It depends. I’d say it’s a scale of fairly easy to very easy depending on how you have everything set up and documented. Essentially, back everything up and install the new distro then put it all back. It will take some time, though. The first time I distro-hopped, I forgot to take a list of my installed packages, which made for some unwelcome surprises when I couldn’t find certain programs. That’s not hard to overcome, just keep a list of your installed packages. Even if you don’t, it’s easy to just reinstall them.