Lol these people saying that Hashirama takes this low-diff. Hashirama probably wins this more times than not, but he's not taking this easily at all, do not underestimate Naruto. To put things into perspective, Perfect Susanoo rivals bijus, and Hashirama, without the statue, was having trouble with it. BSM is BM enhanced by sage mode, so we're talking about something more powerful than PS. Hashirama's wood golem can catch TBBs, but that wouldn't stop a ransengan.
Yes, Hashirama can suppress Kurama, but it's not instant, giving Naruto time to use ransenshuriken to cut through. He's encountered it before, he won't try to use brute force with Kurama like last time. Also, Most of Hashirama's attacks probably won't even hit Naruto. Naruto's speed in BM alone is huge. Imagine that huge speed enhanced, with the reflexes to control it.