While Prime and Norma probably use the same brass ( RUAG owns both of them ) who knows what the rest of the load recipe is.
RUAG supplies a bunch of ammo companies with brass cases... Black Hills, Barnes, GECO, Norma have all used RUAG brass in .223 / 5.56 loadings for sure, I have some of each... and I assure you it is the same.
I have some of both 6.5CM Norma and Prime... and might just break one of each down and compare the weights of the cases, powder and bullets.