Actually size IIRC, but yes. I looked into this this fall for my wife's deer. I forget the details, but the metatarsal glands (on the outside of the back legs) are dramatically longer on a pure mule deer and are the best way to check. Google the subject up.Antler configuration is not a great indicator of a cross. Lots of mule deer do not have forked G2s. I believe the location of the scent glands on the hocks, and the ear size/color are the best way to determine a cross breed.
Nice buck, either way!
What do you guys think about this buck being a hybrid? One side of the rack is like a whitey, smaller rack style, rack color is different than typical mulies and his coat coloring was a brown/gray mixture versus the gray of a mule deer.