Both are very good colleges because the both contains good faculty as per the facilities side LNMIIT is the better when compare to JIIT.
As per the infrastructure JIIT is better than the LNMIIT,it is ur choice to choose the college.Placements both are equal JIIT 2020 placements almost 96% got placed.As per the last year 2019 92 % got placed the most internship candidates got placed in both.The highest package in LNMIIT 58 lakhs.
I hope this information helps you,
ALL THE BEST !!!!