Would a reduction genioplasty/mini v-line cause less sagging than a mandibular angle reduction? (photo)

If you are looking for a significant slimming of the mandibular angles, then complete removal of the angles of the mandible is best. Cortical osteotomies will provide much less cosmetic changes. Having performed multiple gender affirmation surgeries, I have not seen sagging or Masseter muscle...

For mandibular reduction, a portion of the mandibular angle is removed with custom guides, and the masseter muscle is not altered. In some cases, I diminish the inner surface of the masseter with cautery but this is kept to a minimum. It is important for the masseter to reattach to the bone for...

It would be impossible to give you a meaningful advice based on these photos. A series of full face photos, profiles, 3/4 views is needed to better understand your problem. In person consultation with a board certified plastic surgeon with expertise in facial rejuvenation surgery would help....