I would not consider that one a Sunglow Motley. I would call that an Amel Motley (a very pretty one).
Don Soderberg used to have a photo on his website that showed the difference. The "Sunglow" part is an added red wash (I'm not sure if it is Red Factor or another red gene).
It's not the best of photos, but this is a Sunglow Motley that I used to have.