Okay, I get what you mean but hear me out on this one please.
Madara fought adults and was a very skilled ninja no doubt, but can we compare those same characters to Sasuke as a kid?
Sasuke grew up in a shinobi system where they are assigned ranks to fight people with actual ninjustu, taijustu, and genjustu skills.
Not grown ups with swords.
Now Sasuke trained underneath the godly shinobi itachi, right?
He fought chuunin mist shinobis, Haku, Zabuza, orochimaru, gaara, naruto, jugo, kages, itachi, and dsm kabuto while stil being a child.
Now the only significant people madara fought at that age was hashirama (which is honestly no different from naruto) and oonoki with the second tschuikage.
So wouldn't that make Sasuke's battle experience greater than Madara's?
I also find this picture very interesting too. This is EMS Madara with the kyuubi and EMS Sasuke with BM naruto:
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Their Susanoo looks exactly the same to me.
What do you think?