I think when comparing Bey to her peers, besides her outdoing them in every other aspect, one of the main things that stands out is how the majority of her music doesn't get old or feel dated. Songs from B'Day and 4 still sound very fresh. Gaga's music always has an expiration date of less than two years after its release. Perhaps this has something to do with Bey rejecting the dance trend of the late 00's/early 10's but in general her songs have a sort of lasting appeal that others don't have.