Major: Different people have different opinions, depending on your hobbies. If ubc science didn't have coop, I would prefer McMahon's project, because McMahon's project is very good and the major itself is hard-core. Coop can accumulate experience and make money. Perfect. Science majors are not so professional, big but not refined, and they have no skills. But it happened that your UBC science also brought coop, which can make up for the practicality of science. So it's really hard to choose. It depends on your personal hobbies. Do you like general science or engineering?
Professional difficulty: Engineering majors are more difficult. Generally speaking, the courses for engineering majors are more compact and more difficult than those for science. It is often seen that engineering students are bald when they are young. . .
Employment: It will be easier to start the project. Theoretically, it is easier for engineering majors to find jobs, because what they have learned is excellent, and coop can accumulate work experience in advance. It's easy to move from Hamilton to Toronto to find a job after graduation. Sorry, UBC science also has coop, and Vancouver has many employment opportunities, so in terms of employment, these two majors are tied.
If the object is a boy, you should carefully choose an engineering major, because there are few girls. If the object is a girl, the advantage of the option is that you can easily report your thighs. PS:UBC has many beautiful women and handsome men.
Conclusion: too many choices are also a kind of trouble, and the topic is excellent.