I’ve had both installed on an XP SP2 machine, and don’t recall any particular conflict. I’ve used them to check features and functions against one another at the same time.
That said, however, I’ve only got one installed at the moment (Nero). I probably removed Roxio because I was trying to isolate some vexing burner problems I’ve been having with identifying flakey media. It’s not good policy to run both at the same time, unless you can be sure you’re getting good burns on good media.
— Roy Zider