Is Madhuri really a bigger star than Sridevi?

Sridevi's rape revenge drama has grossed over 50 crores worldwide despite its limited appeal and mixed reviews. (http://www.koimoi.com/box-office/mom-grosses-over-56-crores-at-the-worldwide-box-office/) . In comparision all of madhuri's comback films have failed miserably at the box office. So why is madhuri still rated as bigger star than Sridevi? Recently famous southern actress radhika revealed that sridevi is underated in north indian media because she is a south indian.do u agree with her?

Comparison threads are not allowed as they lead to fanwars.