Manufacturers sometimes include substances in their propellants that are intended to reduce the flash signature. However, not all manufacturers include it and I can't tell you who does and who doesn't. I wouldn't be surprised if most don't. Even if a company does include flash suppressant, it won't completely eliminate the signature.
Basically if you want to know what your flash is going to look like with a certain type of ammo, you'll need to test it yourself.