Kelly had her entire abdomen laid open from front to back, and from the diaphragm to the pelvic girdle, evidently to facilitate the complete emptying of her abdominal viscera. Jackson had a "panel" of flesh removed from just above the navel to the vagina, arguably to enable her womb to be opened and her baby removed. There is very little comparison.
Kind regards, Sam Flynn
"Suche Nullen" (Nietzsche, Götzendämmerung, 1888)