They should work together if they are done properly, but I don't have any experience on the Juke specifically. The strut brace will keep the front wheels at the vertical and reduce flexing of the body, so I really can't see there is a downside here when a rear sway bar is added.
What are your aims? Better cornering or better stability? I doubt you'll notice much difference in a newish car, these mods usually work well on worn cars or cars that are driven very hard on the track.