Pretty sure Blackbeards is stronger, he specifically said light can't escape too. Anyway Obito ripped apart a barrier that no sold a juubi bijuudama, gonna go ahead and say he has the DC advantage here, I think he wins, consider the fact that he still has his kamui hax, and he still has the rinnegan's hax powers as well, which includes a soul ripper technique, energy absorption, and chibaku tensei among other things
@YoungChief: blackbeard has the strongest against other devil fruits. in a random fight kizaru has the edge against more characters
I totally forgot Light has no tangible form but its mass... However, I can see Obito bypassing that with the use of the Rinnegan's ability to manipulate gravity, and gravity has the ability to bend light.
even if he bends it, what is he gonna do with that?