Colleges in Udaipur

All Good. But, not for serious learners, classes are not regular and affiliated. Colleges doesn't have regular attendance. It is good for those students, those just want to earn some degrees. It provides a wide range of programs but one should study from his own end and should not totally depend on the University. University of Rajasthan is also good for distance learners because they just need to pay exam fee once enrolled. And, syllabus is easy and scoring good is not very hard. Overall, the university is good from facilities point of view but from academics point of view it is quite okay.
Choice is yours.

Though SOM is much higher in ranking, placements, as well as legacy, an absolute comparison between two colleges is generally a bad idea. You have to decide what you want from your MBA and which school is better equipped to give you that. Here are two articles which will tell you a lot about why SJMSOM is special, rest of the decision is up to you:
https://insideiim.com/ten-reasons-for-choosing-mba-in-iits-ibrahim-katthawala-sjmsom-iit-bombay/
https://insideiim.com/10-things-that-make-sjmsom-iit-bombay-special/

It's worthy. But you have to build your self-capacities. Because MBA from a private institution means you are a job seeker. So building your self-capacities will help you to get a good placement quickly.

You are eligible for appearing in CAT to seek admission in MBA provided your university is recognised and you complete B.Tech with greater than 50% marks.

Malviya National Institute of Technology is the best option after BITS-Pilani for doing B.Tech Computer Science and Engineering in Rajasthan. Admission is based on JEE Mains score.

It doesn't have so much of good placements. You can check it:
https://www.shiksha.com/university/pacific-university-pu-udaipur-38049