How does tummy tuck scar compare with C-section scar?

Typical tummy tuck scar is better quality than C-section scar since it is closed by a skilled plastic surgeon. Also typically can be placed lower . However most tummy tuck require longer scar than  a C-section

Usually the best way to determine this is by the amount of skin that hangs or folds over when you bend at the waist. You can always use a very short incision to create a short scar but you may be cheating yourself and you can be left with extra skin.

A tummy tuck scar is designed to remove excessive abdominal tissue and the incision is closed with some tension to produce the best result. Therefore, there are forces pulling on the healing incision at the end of the surgery and this can make the scar widen.  A C-section scar is closed without tension and the incision heals without tension.  As a result, C-section scars often look better than tummy tuck scars.  In addition, C-section scars are just long enough to deliver the baby while tummy tuck scars must be longer to contour the whole abdomen and sometimes the flanks.