MCC was originally intended to to provide a newly qualified commercial pilot with the skills to work as part of a two person crew. It was intended to be incoporated into the intial type rating, and never as a stand alone or pre entry qualification. Furthermore it was intended to be tailored to the company culture, SOP's and aircraft type.
However, by way of example, you could do an Oxford Aviation MCC on a B737 EFIS, to British Midland SOPS, using Jeppersson plates, have a job interview and sim check on a BAC 1-11 using Aer Lingus SOPs, only to get your first job with Eastern Airways on a J31/41 using Aerads. How sensible is that!
However it's a loop you need to jump through. In selection of the course you should ask if the course also 'qualifies' as a Jet Orientation Course and if it includes EFIS and FMGS. Also dont be misled that the course includes a CRM course, CRM can only be done once you are within your airline.
Bottomline is that MCC prices have really come down so you can shop around and most airlines see it purely as a tick box exercise. Also see if you can negotiate on price, if they have a vacancy on a course in the next few weeks, it probably means they can fill it and you can fill a couse with odd numbers. I know someone who recently negotiated £1k off the course price. Be cautious about paying up front in case the training provider go bust halfway through your course.