"It doesn't matter if it is done on a 737, airbus or fixed box FNPTII, as long as you get the certificate."
DONT AGREE
I beleive your aircraft choice to be important, the reason i beleive is: The type of Aircraft you do your MCC on, should roughly correspond to the type of flying or flying job you want to do!!!
if you feel you would like to fly a 737 or short/medium haul jet, then do it on that aircraft
if you feel you would prefer a turboprop type job, why not try one on an FNPT2 modelled on a King Air or something...
Corporate.... Citation etc etc
....this is important, as well as the instruction, as it will carry a style of the sort of flying you might expect on that aircraft.
I know people who struggled and unfortunately did not pass Ryanair selection after being on a fixed-base FNPT sim for their MCC. Perhaps, they did not get a chance to experience the full-scale of the equipment, the sensation of full-motion, simple things like 'knowing what 15 degrees pitch up" feels like etc etc
Whereas people who had done an MCC in a 737, knew roughly, how the aeroplane handled, what it felt like, and where most of the important hardware was around the flightdeck... i personally, and from what other people have told me beleive that this must be of great benefit to THAT selection process....
as i said before, THAT PARTICULAR process and style of flying. Short/Medium Haul Jets.
conversely, i am certain that the opposite would apply if you were going after something smaller, like perhaps a job flying King Airs around Europe of something... a 737 MCC might not be of as much benefit in that case.
Branded MCCs affiliated with a particular Airline, definately have great advantage to them, not only in the quality and content of the instruction and the aircraft type... but you may find you dont have to wait too long to get your interview/assessment with that airline!!!
MCC is more than just a hoop to jump through. Everyday presents a thorough and challenging assessment, and the skills you develop play a massive part in shaping you as both a pilot, and as a manager, due to the decision making and teamwork skills you will develop!
Ciao.