Wow! Congrats on an outstanding litter. I've been waiting to see normal motley arabesques to see just how they would turn out. It obvious that the motley pattern is overwhelming most of the arabesque features.
To answer your question I would look at significant difference in head stripes and head coloration. The top left motley and bottom right motley kinda have distinguishable head stripes and head coloration. The only reason I say this is that the arabesque traits that have been combined with dominant/codominant traits so far mostly always have arabesque head stripes and speckling. I say this because Grindstaffs Salmon Jungle Arabesques kept the head stripe/speckling and Mark Hauge's albino motley arabesque's still had the arabesque head stripe and speckles. Hopefully there will be more distinguishable differences once they shed. I can't wait to see the individual pics. Congrats! Trey Schneller