M.Com

Hi Dolly!
There's a lot of difference between these two institutions. St. Xavier's college is just a college, and St. Xavier University is a university. There's a lot of difference between a college and a university. St. Xavier's college still offers degrees under the name of Calcutta University and will continue to do so for the upcoming three years at least. But St. Xavier's University will offer degrees under its own name after the first session starts from this July. As for the pay structure, most of the courses offered by St. Xavier's college are government funded and thus people who join these courses enjoy a huge subsidy. So naturally, the fee is low. On the other hand, St. Xavier University is a private university and so does't enjoy government subsidy. So the fee is high.

Different colleges have different application processes to secure admission to this course. Interested candidates can apply online/offline to the institute of their choice. Please check for general admission process followed to secure a seat in this course as mentioned at below:
Master of Commerce M.Com Admission Process:
The general process for admission to M.Com. Course is through an entrance test. The eligibility for appearing in the entrance test is a minimum of 45% marks in Bachelors degree. Common Entrance Test is generally objective type and is of maximum 100 marks. The questions are based on the following topics:
Logical Reasoning
Quantitative Aptitude
English Language
General Knowledge
After entrance test, students are shortlisted for Group Discussion and Personal Interview round. Some universities may not conduct Group Discussion. There is no minimum or maximum age bar for this course generally. Universities such as University of Delhi also offer direct admission to M.Com. Programme. Direct admissions is offered according to the merit in undergraduate degree. Generally, students with a first class degree in B.Com. Are given direct admission to the M.Com. Programme. Regards.