A okay let's clear up a few things.
Madara gain EMS because he stole his brother eye he also awaken rennegan because he bit off some of the 1st hokage skin. that being said the rennegan is stronger than both EMS n Regular. That being said it's not a better power especially not against a Jinchuriki that genjustu doesn't work on. And a rennegan #1 weakness is taijustu. It's a stronger power but not better.
Madara gain EMS because he stole his brother eye he also awaken rennegan because he bit off some of the 1st hokage skin. that being said the rennegan is stronger than both EMS n Regular. That being said it's not a better power especially not against a Jinchuriki that genjustu doesn't work on. And a rennegan #1 weakness is taijustu. It's a stronger power but not better.