Tummy tuck removes excess skin and fat from the abdominal area and tightens the muscles of the abdominal wall. Liposuction, on the other hand, removes excess fat from specific areas of the body through a suctioning process. While both procedures can result in a slimmer, more toned appearance, tummy tuck is typically a more extensive procedure and is best for individuals with loose, saggy skin in the abdominal area.