Depends on which versions you are referring to. If you are talking about Wolverine (James Howlett (Earth-616)) and Sabretooth (Victor Creed (Earth-616)) from the standard continuity (Earth-616)… then no. They are not siblings at all. Though, there is a chance that they might be related. read more
Sabretooth has basically the same powers as Wolverine. The only difference is that Wolverine has his claws in between his knuckles (Sabretooth has fingernails/claws) and Wolverine has Adamantium lacing his skeleton. So yes, they have equal enhanced senses. read more
Wolverine explains to a bewildered Creed that it is because the sword interrupts the healing factor and that he has to finally kill Sabretooth for what he's done. Managing to regain control and speak between grunts, Sabretooth tells him, "Do it". Wolverine then decapitates Sabretooth, finally putting an end to his long-time enemy. read more
Sabretooth (born Victor Creed) is a mutant who, like his younger half-brother Wolverine, has a number of animal-like abilities, such as retractable claws, enhanced senses, and a regenerative healing factor. read more
Once he and Wolverine became regular sparring partners, his healing powers were increased to make them the equal of his enemy. Sabertooth's powers: Sabretooth is a mutant with a number of natural mutant powers and artificial improvements to his physiology. read more