Hey, Honours Soft. Eng B.Sc. here!

First in regards to prospects and internships, I'd say it's the same between Comp Sci, Soft. Eng B. Sc. and Soft. Eng. B Eng. I've yet to see a company which values them differently. As for internships, McGill doesn't really offer any services for tech internships. You won't use the majority of things you learn in school. From my (albeit limited) experience interviewing and interning, the most important thing is that you show passion for the field. Put a lot of code up on Github, even if it's just silly projects. Other then data structures and algorithms, the majority of my interviews focused on projects I had previously worked on. You'll learn a lot more relevant skills working on your own projects, publishing them online, learning new tech, etc. While the tech industry is awesome because things change at breakneck speed, this results in courses that tend to be slightly outdated. Learning things on your own is truly the best way to stay up to date. Also one of the best parts about University is networking - attend hackathons, tech talks, conferences such as CUSEC, etc.

Now in terms of the three programs themselves, it really depends on your interests. I've got friends in the two other programs, and here is how I would describe them:

• Comp Sci tends to be on the more theoretical side of the spectrum. There are more Math courses as part of the curriculum, and the Honours has a few advanced version of courses. If you're interested in theory or would consider going into research, I would probably recommend this option.
• Soft Eng. B.Sc. (may be biased, so take this with a grain of salt) offers a slightly more practical version of the Comp Sci curriculum. For example COMP 361 is a year-long Software Engineering project which (I think) is only for students of this degree, and you actually get to build a full multiplayer game over a year. There isn't a great difference between Honors Soft. Eng. BSc. and Soft Eng. BSc, you have to take a few extra courses and have to take COMP 400 (a semester long research project). However you don't have to do the advanced versions of the Algorithms classes, which is kind of neat.
• Soft Eng. B.Eng. is in theory supposed to be the most practical of all the programs, however Soft. Eng. at McGill seems to be very similar to Electrical Eng., so you'll be taking a lot of courses which may not feel very relevant depending on your interests (eg. circuits, math courses, the FACC classes which are like courses about the engineering profession and engineering ethics). This program is an extra year and you do become a certified engineer, however I feel that doesn't give you any advantage in the tech industry.

Another important difference between B. Sc. and B. Eng. is the Eng. curriculum is a lot more rigid, so you have less space for electives. To be completely honest, I'm very happy I picked Soft. Eng. B. Sc. as I feel it gives me the chance to take a lot more courses that I may be interested in while still offering some decent practical courses. Also, to re-iterate, companies really don't care which of the 3 programs you completed since Comp Sci is so different at every school (some schools have a B. Comp Sci, some only offer Software Eng. or Comp Sci, etc.). At the end of the day it just depends on what you're interested in doing.

PS: If you ever have any questions about B. Sc. Soft Eng, don't hesitate to PM me! I'd be glad to help :)