Will I regret a mini tummy tuck (3/4 the scar...half the result) or should I wait and do the full tuck? (Photo)

You appear to be in an "in between" category for mini vs full tummy tuck especially given your desired scar location. With a full tummy tuck, all of the skin between the belly button and the scar location is removed, and the upper abdominal skin has to expand enough to stretch all the way down to the scar. That does not appear to be realistic ion your case, so the next option is remove less skin, and close the hole in the flap where the belly button was with a vertical line (T-closure.) This is all related to the position of your belly button, which is a little bit high. You might consider a mini with umbilical float, but that would not give nearly as much tightening to the upper abdomen - just more than a straight mini.

Dear HourglassElle2015,
it is hard to tell for sure without an examination. If you are considering surgery, I would suggest you consult a board-certified plastic surgeon. Only after a thorough examination, you will get more information and recommendations.
Daniel Barrett, MD
Certified, American Board of Plastic Surgery
Member, American Society of Plastic Surgery
Member, American Society of Aesthetic Plastic Surgery

The mini will do nothing for upper abdominal skin. There is always excess skin when you sit or bend over, and you are pinching your upper abdominal skin. I would suggest considering a full tuck. If you don't want more scarring, consider minimally invasive skin tightening with radiofrequency like ThermiTight.