In technicality terms, the matte black on a glossy paper may smear or not stick properly as the chemical in the matte black is "thicker" like a gel in which it would be more compatible with matte media (no sheen). This is what the photo black was made for towards papers with a sheen (luster, semi-gloss or gloss). Not saying that it will NEVER work using the other black on opposite media, but this is what most have seen after printing. Photo Black on matte paper may look off in the color (shadow details or what not).
If it works for you, great! From many test prints, matte black ink on matte media and photo black ink on papers with a sheen for best results; but not the ONLY way.