Tiger salamander taxonomy is in a state of transition and uncertainty. What were once considered subspecies of tigrinum are now assigned to mavortium. The geographical lines between the subspecies are uncertain, and with the high variability of these animals, determining subspecies on appearance alone will be difficult and imprecise.
I think all anybody can do from this end is take a guess, so here's mine- I think that they're both A. m. mavortium. Although the specimen on the right has very little black, I don't think diaboli are known to be that yellow. All the specimens (or photos) that I have seen are gray or maybe olive colored.
