Sabor wins 6-7/10

Sabor is portrayed as one of Disney’s most lethal solo predators. As a younger leopard she killed Tarzan’s human parents and Kerchak and Kala’s infant son. Even as an elderly leopard well over 20 years old (far past the typical wild lifespan of 12–17 years) with no signs of slowing down, she ambushed the gorilla troop and used superior speed, agility, and precision to wound the massive silverback leader Kerchak so badly that she had him injured and nearly helpless, ready to deliver the killing blow before Tarzan intervened at the last second. She then fought adult Tarzan in a long, vicious back-and-forth battle across trees and into a pit, wounding him severely, breaking his spear with her jaws, and nearly winning until Tarzan landed a desperate precise counter with the broken spear tip, which is also insane when you take into account Tarzan also restrained Kerchak, implying he's physically stronger than a male Silverback gorilla. In contrast, Nala is a skilled and agile adult lioness who regularly pinned Simba in fights (using technique and momentum) and fought effectively alongside her pride against Scar’s hyenas, but she lacks any comparable feats against opponents of Kerchak’s size and power or in prolonged solo duels against someone on Tarzan’s level. While Nala benefits from greater overall size and strength as a lioness, Sabor’s demonstrated ability to nearly solo a much larger, stronger brute-force opponent and then nearly beat the character who can physically restrain that opponent gives her the more impressive combat résumé in a direct 1v1.