The lengths of the incisions from side to side (or hip bone to hip bone) would be comparable for your problem as seen in your photograph. Both would run above the pubic bone level horizontally. The amount of loosening from the pubic area above this area determines full versus mini-tummy tuck.
Mini-tummy tucks do not loosen the tissue above the belly button and, therefore, remove less tissue than a full abdominoplasty. Full abdominoplasties loosen the abdominal skin higher than the belly button, allowing removal of more skin, producing more tightening, and also permitting horizontal tightening of the abdominal muscles.
Based on your photograph, these additional advantages should be something you consider for the full tummy tuck. The mini tummy tuck may be a shorter duration procedure with less cost, but it will not produce the improvements of a full abdominoplasty. A one on one consultation with examination by a board certified plastic surgeon is necessary to help you make your choice. Good luck!