St. Xavier’s College is an autonomous university. Classes and examinations are held regularly at the university. There is also a mandatory 75% attendance rule that you need to follow. If you want to take admission in B.Com (Hons), you need to have Mathematics in your 10+2. However, since it is a private college, the course fee is higher.
Marwari College is a Govt. college. The classes are held regularly. They also have a 75% attendance rule, but it can be adjusted. Sometimes examinations get delayed.
You can choose either of these two institutes according to your convenience.