Universal (Hodgdon's Clays Universal) is the substitute for Unique. Burn rates are the same. I thought this was common knowledge, guess I was wrong.
HOWEVER! You cannot simply use Universal in the same amount as Unique, i.e. you can't use 5.0 grains of Universal for recipe using 5.0 grains of Unique. While they have the same burn rate, they are of different configurations.
I switched from Unique to Universal because Unique is filthy. While the new Unique is somewhat cleaner, it still turns my guns black after an extended range session.