In reply to eric.

Interesting take. Almost all of Janet's videos are of her dancing (and basically Janet doing her best Michael) so that would make them easier to emulate while many of Madonna's videos were less dance focused and more fixated with raising the bar with production quality in front of and behind the scenes and pushing society's buttons. Also, Madonna and Janet are peers and when they were at their peak Madonna was the one dictating pop culture to the point that she is so ingrained in our cultural brains that Janet does stand out more now.
As for as Janet's music being played in public? I guess that depends where you shop. I am constantly hearing Madonna tracks, including deep cuts, played at my local Target, Kroger, Bath & Body Works, restaurants, etc. but I have not heard a Janet track in years.