"B" in this case doesn't mean simply "better" - cause that would mean that the basic version is "worse", which cannot be said about that track! "B" here means "even better" - basic is great and this one is even greater! There's also Teufelsbach Platin version - and all those versions are literally The Best! Thanx.
I wish you to find the highest possible speed between the two barriers of the new chicane. Good luck!