RIMT University will be better than SGT. RIMT has course fee much lesser than SGT university. The median salary offered is around Rs.3,00,000 per annum which is also higher than the average salary offered at SGT placements. Basic Infrastructure are the same for both but RIMT is established in 1998 so the institute is experienced enough to conduct courses and to manage and shape the career of the students. Also from the official website you can see that the faculties are well connected with research which avail you to get updated knowledge in your field.

This are points which I think is great to decide. Although I will recommend that you should conduct a research by yourself about both the colleges and then decide which you will want to opt.

I hope my answer helps you. All the very best for your future endeavors!