Yeah but a lot depends on who you apply to. If you turn up for your sim check on a 737, proudly holding a 737 MCC certificate with 30 hours(or whatever it is these days) time on it then the examiner is naturally going to expect at least some glint of knowledge as to how to operate the thing. Rod already created for your own back! Turn up with an MCC done on an FNPT then the examiner can assume you wouldnt know the difference between a 737 and an A320. All theyre looking for in that instance then is that you can follow the instructions your given...fly the power settings and pitch attitiudes they tell you... and display good MCC and situational awareness. Its the candidate who can show ability to learn and demonstrate what theyre being taught that will stand out a million miles. Personality and proven qualifications will of course play the major role.