yes you are correct on them being the same gene ( well sort of)

on the note of them looking nothing alike, when have you seen 2 balls from the same clutch look exactly alike color wise? look at RDR's birthing record when he produced the king pins every one is a diffrent color. the pinstripe used for the mojave pin may have not had the stripe down the back as some do which might have been genetic causing this mojave pin to look diffrent. i would want to see more of these animals to say if they do or do not look alike. the lesser pins might be lighter in color( as they do with any morph combined with ) but they are the same base.