It would seem from Rashi on 29:17 that the difference between appearance and form is form refers to the form of the face and appearance refers to the shine.By Rochel, there is a contrast between Leah's eyes from crying to Rochel's shine. The form of the face may have been the same.
By Yosef, Rashi refers to making himself beautiful which again is the shine, not the form. The form is how Yosef was born and not something to be punished for.
By Sarai, the attraction is the shine before the form. Like a glittering diamond of perfect form, it is the sparkle catches your eye.
By Aishes Yafas Tohar, she is crying for her father and mother. There would be no shine, but the form would remain the same.
The order of form and then shine, even though backwards when describing a person's beauty, makes sense when it is the shine that is the added feature that is the praise of Rochel and the cause of trouble for Yosef. They had beautiful forms from birth. The shine came later.
Important Numbers
