Both the courses good because Btech is a technical course related to engg. whereas the MBA is a Management course related to business.
In India, a B.Tech degree is offered across various specialisations. Some of the more prominent ones are as follows:
Computer Science Engineering, Mechanical Engineering, Chemical Engineering
Aerospace Engineering, Civil Engineering, Electrical Engineering
Ceramic Engineering, Electronics & Communication Engineering
Instrumentation Engineering, Metallurgical Engineering
Petroleum Engineering, Electronics & Electrical Engineering

https://www.careers360.com/courses/b-tech-bachelor-of-technology

Master of Business Administration or MBA is one of the most popular post-graduate programmes in India and abroad. The two-year programme is a gateway to a plethora of job opportunities in the corporate world. Here are some important facts about the MBA program:
What makes MBA such a popular course is that students from any background - including Science, Commerce and Humanities - can pursue it.
A regular MBA or Post-Graduation Diploma in Management (PGDM) is generally a two-year course divided into four or six semesters. However, there are certain private institutes that offer one-year PGDM programmes as well. One can pursue MBA in various modes, such as, Regular, Online and Distance-Education. Interested candidates can also find programmes customised based on their professional experience such as Executive MBA.
Many management institutes offer Post-Graduate Diploma (PGD) or Post-Graduate Programme (PGP) in Management instead of an MBA degree. There is not much difference between the two, but for their titles.

https://www.careers360.com/courses/mba-master-of-business-administration
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Dear Student,

Both the courses good at their own we can not compare them because Btech is a technical course whereas the MBA is a Management course.After Btech from Computer science or IT stream there will be many opportunities available for you You can pick any field according to your choice.Engineers go for MBA to get higher position  or management roles or for knowledge of enterpreneurship and business management.If you have interest in MBA you can also go for integrated degree Btech+MBA it will save your 1 year which will take 1 year extra if you do Btech and MBA separately.Now a days it becomes a trend to do MBA after Btech but it will be of no use if you don't pursued it from reputed business schools.Some btech graduate students do MBA for good placement opportunties.