Jain Deemed-to-be University, Bangalore

generally ph.d can be pursue after masters.according to me do ur m.tech first then try for ph.d. all d best.

Individual considerations also count. When you go in for a place, you also consider your own difficulties and comforts. Then only, you can study well.

Go with the alliance teaching staff is experienced as compared to CMS.

It is a decent choice.

BBA and MBA in finance

Kindly refer to the link to get the proper college comparison.
https://www.shiksha.com/compare-colleges
Also, if possible, talk to some of your friends who are currently studying in both the colleges.

Jain university is a decent choice. You should always judge certain parameters like infrastructure, strength of faculty, degrees of faculties, affiliations and accreditations of the college, placement record. Most importantly one should try to contact the alumni for error free feedback and if possible one should visit the campus also. All the best. Thank you.

Indian universities come under the University Grants Commission (UGC) and can, therefore, award degrees like the MBA degree, also known as MMS in Mumbai. Universities follow the UGC format for course content. On the other hand, reputed management institutes design their courses based on industry feedback and business relevance. They are not covered under the UGC.
Importantly, when it comes to job opportunities, institute reputation matters more than the name of the degree or diploma.

MMS course offered by any college is affiliated. You just need to go by placements.
https://www.shiksha.com/getListingDetail/424/institute/college-Jain-University-Ju-Bangalore-Bangalore-India

University is with a good ranking and also, you can continue your B.Tech at this university.