Dear Madam/sir

I have gone through the websites of several Canadian universities offering LLM courses in various streams.
However, I failed to find out as to why there is a huge difference in the tuition fees of these courses.
For instance, tuition fees of LLM General (Thesis) is around 9000 CAD at UBC compared to LLM in Common Laws, whose fees is over 32000CAD. Same is the case with most of other universities.
I would be very thankful if someone can through light on this issue.