A Smilodon skull looks very different from that of a modern big cat. Sabercats are fundamentally different from feline (modern) cats. Instead of having a strong bite force, they have the capacity to deliver a slashing, shearing force with their saber-like teeth. They were probably adapted to rip the prey’s throat out with one slice, or possibly to eviscerate smaller to medium sized prey.
Wolverine with bone claws. When Magneto ripped the Adamantium off of Wolverine's skeleton in X-Men #25 (1993), it was revealed the next month, in Wolverine #75 (1993) that Wolverine, in fact, had bone claws, and that the claws must have been a part of his mutation, all along. Previously, Logan was under the belief that the claws had been added by the Weapon X Project, as he had no memory of ever using them before his time in the Weapon X project.