One example of a Slayer being stronger than most vampires is in "The Gift", when Buffy easily lifts Olaf's hammer with one hand when Spike was barely able to do so with both hands in "Blood Ties", and when she defeats the demon Doc easily when Spike is unable to. Angel also remarked in "Sanctuary" that Buffy is "a little bit stronger" than he is, though the humorous tenor of the exchange suggests he may have been understating the difference.
