KJ Somaiya is definitely a better option of the two. My cousin is a KJ Somaiya alumni and he claims the college to be one of the best in the country

• KJ. Somaiya has a location advantage over IMT Ghaziabad 
• It boasts of a splendid infrastructure world-class amenities 
• You can expect a high ROI from this college
• It has seen an improvement in its rankings and now its NIRF ranking is 71st
• The placement scenario has changed for the better. The placement percentage this year was 93%, the highest CTC stood at Rs.22.50 LPA and the average salary stood at Rs.12.23 LPA

Judging from these points one can easily say that KJ Somaiya is a better option than IMT Ghaziabad. Also if you have an excellent resume and a strong profile you can also go for IIMs or other top B Schools.