I would guess that since I think both these traits are linebred (the use of "hyper axanthic" is not common with leopard geckos. What exactly do you mean?), you will get offspring that express each trait on a continuum from none to some to a lot.
If you breed those two together, assuming no hidden hets, you'll more than likely get babies that look just like them with varying degrees of yellow/orange coloration.
IMO hyper xanthics are more yellow than yours appears to be. Their yellow coloration also appears to color over their black spots and they tend to have a fairly distinctive "hour glass" pattern on their back and some yellow color running down their tails (sometimes called lemon tail). Where the line in the sand between high yellow and xanthic is drawn is sometimes a matter of opinion but I tend to only call geckos that are very distinctive xanthics.