Hello

Both are best for CS. In both the colleges you get industrial exposure and  good educational experience.

Let us compare both the college on a wider aspect:

Placement : vit chennai around 4 lakhs , LNMiit jaipur around 5 lakhs

Fees : vit chennai have less fee around 7-8 lakhs while in LNMIIT it is around 14- 14.5 lakhs

Infrastructure:  both have a good infrastructure .

But vit have a good reputation than LNMIT.

Feel free to ask

Good Luck....