SASless
There is one big fact you have been over looking. The B212 was never operated to Cat A performance specs. The EC155B is required to meet Cat A. Granted this must be achieved using a much different takoff and landing profile. I loaded passengers just the other day at the same time. It just has to be from both sides of the A/c. Which the 212 can't do if someone is in a well seat. I think if they had the performance charts to operate to Cat B for the EC 155B you'd find it performs just as well as a B212.