regular dual rennigan madara would get annihilated by naruto, period. dual rennigan juubi madara is a different story. even saying that though, madara never had an easy time against naruto and sasuke. naruto was able to fight hand to hand combat with limbo clones he couldn't even see. chibaku tensie was useless against him as he can destroy them in an instant. technically, i would argue they don't actually have the same power. it's similar yes, but their abilities are very different thanks to how they received that power. saying that naruto only has a piece of the tail beast is not truly accurate either. obito had more of the tailed beast sealed in him, but naruto is way above what he was. so what i conclude is that naruto's bijuu power is amplified immensely by his senjutsu. also, absorbing jutsu is slow, and limited to absorbing one jutsu at a time. there is a reason, to me at least, why madara even after getting his other eye, decided to go ahead with infinite tsukiyomi.