I love all these comparisons to such things as car manufacturers, gordon ramsey etc.... It doesn't really help to be honest.
I could make a comparison in that its like the Undertaker, they keep letting him win his matches at Wrestlemania because the fans love it!
Just like Alton are going to keep using B&M for all their Secret Weapons because its a winning formula! Lol
Kaz your spot on with what you say, all the council are concerned about is which way the track goes. Doesn't matter who makes it as long as it goes that way. If the council needed lots of info then there would be a carriage on the track to demonstrate the width and style of the carriage.
Don't forget folks, Alton used B&M for their SW's because of how quiet they are, albeit Nemesis with its loud wheels :p
The people of Alton would want the least noise as possible, the comparison to X-No Way out is simply to convey the noise levels within the building. There will inevitably be noise of the ride on the track in the woods but B&M will make it as quiet as possible.
All well and good but B&Ms are partly distinctive for their roar. The only reason why the rides at Alton are semi quiet is due to them being stuffed full of sand.
Personally I'd say Rita is quieter than say Nemesis or Air...
I believe the B&M roar is due to the box section track being able to resonate more as a train passes over it, than say a tubular design.
If two rides were built, identical to each other, one by Vekoma, the other by B&M, offering identical ride in terms of speed, G force and experience. Could the extra cost be justified to just have the roar and slight extra smoothness of a B&M when the Vekoma model does everything you want for a fraction of the cost...