Interesting, I had the opposite idea. I come from doing B2C product and now work at a B2B SaaS company and my first thought was that B2B is so much harder to crack because existing solutions are really feature complete and clients are not going to tolerate for your service to have quirks or errors.
I guess B2B and B2C are not that much different regarding user tolerance and it just comes down to how much unique value is your solution giving to the customer.
American Express - Amex Brazilian Express - Brex