A hysure is an azure containing hydrogen.
Azures are usually blue while hyzures can be any color (excluding deco).
So basically and usually, GBMB is the main ingredient for azure while there is no main ingrediant for hyzures.
Hyzure is just a name that the user pexy gave to several of their azure bombs in a certain series. It is not actually a special designation or version, and no real dfining diffrences from azures. All it served as originally was sort of like a brand name, and it had no purpose outside of that. There is no reason not to call your azures hyzures, so go ahead if you would like.