He didn't say regular Rasengan would do the job. He's saying that maybe a BM Rasengan from the current Mr.T & Chuck Norris of Narutoworld,Naruto, would probably manage it. He managed to repel 5 TBB's with his hands,how can you say that his BM strength is even in the same universe as A or The sand Ninja's Jutsu?I never said a regular Rasengan would do the job.
But if Naruto did Rasengan in BM mode (which he has not, he/Kurama did TBB. Not the same thing), then I'm pretty damn sure that would break through Sasuke's Susanoo.
MasterofSenjutsu is putting forth some very good points,instead of shutting your ears and claiming no. Maybe actually think about it people. +rep