Thanks for the clarification @Twoin18. I should have said “exam, paper, or project.” In fact, D is headed for the sciences so in addition to the final exams, she will have problem sets and labs leading up to that. (IOW, she’ll have more opportunity for self-assessment prior to the end of the term than a humanities student.)
I’m not so much concerned about the format - it is what it is - but more about the support. Will she be able to visit her professors during the term and get a pre-read on a lab report? Will she be advised appropriately in Canada to get the classes she needs for graduation (UK definitely, the modules are listed right on their websites!)? If she doesn’t understand the concepts in the recommended reading, will she be able to find advice on where to to for extra help/one-on-one tutoring?
I know the answers to all are “yes, with effort on the student’s part” - so where is it easier? Or is there no real difference?
On grading - yes, the different standards will be difficult to swallow but she’ll deal. It’s a mindset thing. I’m curious if the actual distribution is similar, or if Canada really is less likely to issue thier top grades. Is either country in the habit of failing students, or are there quotas for weeding out especially in the freshman year? I realize this is also a loaded question, and can be course-specific. I have the impression that UK students generally finish, but the differentiation is in the honours class conferred, whereas Canadian students get placed in easier majors, or transfer when they can’t keep up.
Not that I expect her to fail out! But having gone to a weed-out school, and had friendships dissolve when others transferred, I value a high level of student retention and would guide my D to look for that. She, of course, can make up her own mind whether she cares about that. 
Part of the reason I posted is to see if we can remove one set of applications from her list. I’m looking for compelling reasons to encourage her to focus on one country or the other.