I'll say this: I'm fairly certain if B&M were designing a water ride, the vehicles would actually fit. You cannot say Intamin reliability issues are overblown, and that it's not on Intamin - obviously there is a pattern. In fact, as of now a 3 year old coaster (which had to be modified upon completion, not unlike another recent Intamin creation) is inoperable and expected to be down for up to 8 more weeks.
I'm not saying I prefer one to the other, I'm simply pointing out that there are certain reliability issues with Intamin designs. IMO the reason B&M machines are so much more reliable, and so much more forceless, is due to a superior engineering team. I by no means prefer forceless, but when you look at these companies side-by-side from a customer's point of view, Intamin appears somewhat fly by night.