In these matters I am always on the sceptical side. Just saying that one has to overcome many things to proclaim a new species or a new morph even as a scientist, not to mention a hobbyist - almost no one would trust a hobbyist.
These photos even I have seen before. They appeared about 5-7 years ago or so. And they are still used today? Or dug up to make a splash, create a hype and a sale? IDK. Where are all other super yellow irwini specimen caught in the wild or raised in captivity?
I am with Krich that this smells like the flash zebra juruense marketing trick.
Head and mouth shape varies in humans too, especially with geographical location. They are still all the same species.
I know how much you are fond of irwinis. I don't want to pour on your parade but want to learn through you, whether this is something new or not.