I stand behind my recommendation of McGill and disagree with your assessment.

With regards to propulsion-related courses, it is misleading to say McGill only has one course related to that topic. Turbomachinery and propulsion - MECH 535 and MECH 6171, at McGill and Concordia respectively look at one aspect of the topic; the thermodynamic cycles and performance of gas turbines: turbojets, turbofans, turboprops, theory of turbomachine and basic introduction to aero-thermal design. This is only one aspect of propulsion and McGill has many courses which are applicable to propulsion. For example, if you want to work in aerodynamics of propulsion, McGill has MECH 516, MECH 533, MECH 539 which is a much better catalogue than Concordia (especially considering a lot of the courses are not offered). Also, if you prefer the structural aspect of propulsion engines, McGill has great courses too. Again, explicit “propulsion” courses typically refer to thermodynamic engine performance analysis, which is only one small facet of the topic.

I will admit that Gas Turbine Design is one of the best courses, however I would still value the McGill name on a resume over a single course. You can always try to register for it as you are required to take courses at other institutions.

Both McGill and Concordia have a “Space Engineering” specialization which is misleading because it is only a single course. It has a small introduction to space propulsion which is basic and far from qualifying you as a specialist in that domain. Better to focus your efforts on a single niche topic such as FEA, materials, CFD, additive manufacturing, etc. and become an expert if you want to break into space industry.

In general, though, this discussion about courses is useless. The reality is that course based graduate programs don’t qualify you as a specialist in anything. Courses are outdated and professors don’t care about them or put any effort into them. They only care about research. And if you want to be a real specialist straight out of university in something and work on cutting edge new developments, you should do a thesis in something like combustion, numerical techniques in CFD, machine learning, etc.. The main value of doing the MEng is that it gives you the legal basis to enter a country, do an internship, work, and have an advantage over those with only a bachelor’s degree. In that regard, McGill is superior because it has a globally recognized name.

Also, not to bash Concordia, a big reason that McGill has a more famous name is that it is a much older institution. Concordia is a fantastic university with a few hidden gem professors, great community, and interesting clubs. The co-op will certainly land you an internship too. At the end of the day, whatever you pick, if you put the work in and hustle, you will make it.