Gluons in quantum chromodynamics (QCD) come in eight color charge varieties. But, it has never been clear to me if they differ from each other in other respects the way that, for example, photons do. Obviously, they also have a direction and location associated with them (subject to the uncertainty principle) and presumably, as massless bosons, always travel as the speed of light.
Do they have different frequencies or differing amounts of energy? Do they have different helicity? Do they have polarizations or chirality that is distinct from color charge? Are there other possible properties that I've overlooked?