A huge difference in headline figures, but it's kinda meaningless. Someone could do twenty hours of private study, whilst another does ten... with the latter actually learning/doing more than the former!
Then, some people have loads of contact hours (sciences, for example) whilst others don't have many (I'm a law student)... but that doesn't mean the chemist does more work than the law student. I only had about ten hours a week of contact time, but I had to do a truly ridiculous amount of work outside of that... whilst my chemistry studying friend had to do less... so, overall, we were probably in a roughly similar position.
But no, I wouldn't want my course compressed! The fact that I have a quarter of the headline hours of a course with forty hours of contact doesn't mean I could do the course in a quarter of the time!