Slogans had to be approved before being applied to the tanks. Often every tank in an outfit sported the same slogan! I don’t read Russian so my info is limited.
My son is the local Soviet expert. His tanks have one slogan on one side of the turret and a different slogan on the other side of the turret. All tanks in the same outfit are decked out exactly the same.
I have no idea where he got his source material.