Where did you get these from? My brother did Maths at Cambridge about 7 years ago and paid the same (pretty much) as I did for my degree at Sheffield Hallam.
I'm talking about the actual costs to the university, rather than what people pay. What people pay is the same. That's the point.
*edit* I believe I got them from the overseas students documentation, because they pay full whack per course, and obviously, it's not the same cost per course.