I already conceeded the wing tip difference likely made it a different variant.The concierge paint lacks any blue "emissions"/lighting, while this is clearly present on the 4th ship.
Normally they would show the Concierge paint with new releases/concepts, but what is shown in the picture is not that.
The Concierge paint is similar, not the same. We don't know if there is or isn't a 4th variant and it could just be an earlier iteration of the paint, if not for the wing tips, which could also be an earlier iteration. The black with the blue emissives is the MR, the unnamed variant is black and gray, with yellow piping, and less emmisives similar to the Concierge paint. There are differences but it is similar, especially where the gray and black transition.
But I agree it is likely a variant, which may, or may not, show up in the future.