Just in that she's a little more naturally positioned - a longer stance to her body and her head not held quite so high. It may look like her head is being held up by the leash but that's really not the case. I feel like the photographer could have taken a few more moments to let the dog be repositioned for the second picture. (It was the same photographer for both pictures.)Why is the first pic better than the second ? Maybe just a tad clearer ?

