If Rihanna and Nicki Minaj were in a twerk battle, who would win?

This video puts the two females twerking superstars side by side for comparison. Who do you think has the best twerk moves?

Rihanna - Work (Explicit) ft. Drake [OFFICIAL MUSIC VIDEO]

CAREFUL LANGUAGE NSFW

Nicki Minaj - Anaconda [OFFICIAL MUSIC VIDEO]