I wish this was sized a bit larger, I almost overlooked it because it is a bit busy.
Aside from the very subtle "cheeky" aspect (can't resist), I am drawn to the axis created by the woman's gazing at the dog who is pulling for all he's worth. Then the dogs head with tension creating a line following to the girls arm, and finally the tension let out in the ladies arm. Add to that the girls body leaning in the opposite direction.
And nothing wrong (IMO) with color on either model.......yes, a bit easier to realize on the older model
Always fun to see what people are shooting...very nice images here.