Today the manga proved this to us, but I just only realized it. When argurment arose earlier of naruto's rasenshuriken being able to destroy sasuke's susanoo, everyone gave their own assumptions as to what they thought, which no one having any actual proof. Well my brothers and sisters, i feel as though today the proof has been given.
In chapter 615 we saw an upset obito preparing to fire a Juubi TBB diractly at the alliance, and he explained to madara that the juubi would protect them because its skin is extremely tough. So the juubi wraps itself within its tails to prepare to tank its own blast
So, what we know is that the juubi is strong enough and tough enought to tank this:
Now, in the recent chapter we have seen naruto's rasenshuriken slice cleanly thru the juubi's tails. These are the same tailes that were going to tank at juubi bijuu dama. The rasenshuriken naruto holds out in front is the rasenshuriken that cuts thru the juubi's tails:
I found it intresting that a combined kyuubi enhanced alliance attack couldnt harm or damage the juubi's tails (it only repeled them), but 1 naruto rasenshuriken could.
So here's my point. If you think sasuke's susanoo can tank this:
Than he most likely would tank naruto's rasenshuriken. But for all the logical people on the base, i just wanted to bring this to your attention.
Juubi's skin is tough enought to tank its on TBB, but its not tought enought to not get sliced by BM rasenshuriken.
Now, in no way am i saying that BM rasenshuriken > Juubi TBB, im just saying that rasenshurikens slicing abilities obviously are great. So great that it could slices through the same juubi's tail that could tank a nova blast.
With that being said, this is my reasoning on why i believe BM rasenshuriken would slice cleanly thru sasuke's susanoo.