wow good question the thing is madara knows obito's fighting style and tought him alot of the stuff he knows so he probably knows about the 5 minute intagibility limit or that his teleportation of other people is close range on the other hand obito knows his masters technique well and has been shown to be very skilled in fire style but, they both have the rinnegan, they both can summon the gedo statue, they both have powerful sharingan and they both have hashiramas cells so to be honest i say a draw but i kinda have a feeling due to his age madara would have the advantage.
obito=madara (probably)
you should make a poll i would be interesting to see the results