KJ Somaiya is better of the two it has comparatively better faculty and a huge campus. You get to meet student from various fields and not just engineering lastly it is also more competityive to get into. There is a reserved quota for Gujrati so if you are eligibke for it then give it a try.

According, to careers 360 KJ Somaiya has AAA+ rating which means good and Ramrao Adik Institute has AAA rating which means above average. 

Ratings are based on Placement, Faculty, Cut-offs of national / state level Entrance exams, Accreditation and Reward status and Publication record from Elsevier’s indexing database - Scopus.

Good Luck!!