Hey,The placement records of both the colleges are mentioned below:

RMK:-

Avg package-3.5 LPA

Highest package-5.5LPA

Rajalakshmi college:-

Avg package-4.5LPA

Highest package-26LPA

As per the placement records I would suggest you to go for rajalakshmi college as it provides you better placement opportunities. Rest is upon you.

Hope it helps.

Good luck.