Both the CA and B.Tech (IIT) are good and provide immense opportunities to the candidates; you should choose one of these according to your background and the interest.

In terms of Earning Potential, B. tech is good choice rather then CA. for your reference here I am giving you the list of top B. tech colleges in India:

Jadavpur University-Faculty of Engineering, Kolkata (JUFOE-K)

Netaji Subhas Institute of Technology (NSIT)

Coimbatore Institute of Technology (CIT)

Delhi Technical University ( Formerly Delhi College of Engineering)

MNNIT Allahabad - Motilal Nehru National Institute Of Technology (MNNIT-A)

Andhra University College of Engineering (Autonomous)

College of Engineering Pune (COEP)

National Institute of Technology- Kurukshetra (NIT)

Amrita School of Engineering

Nirma Institute of Technology

Indian Institute of Information Technology Allahabad (IIIT-A)