First of you must know the difference between them, Sri Sairam Engineering College is an Autonomous college affiliated to Anna University and Sastra University is deemed to be an University.

Sairam Engineering College's infrastructure is good and provides good education. The main factor of this college is placements. They provide the best placements in colleges around Chennai.

You can also click the given link below, to know more about the colleges and also read the reviews written by the students.

https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.careers360.com/colleges/sri-sai-ram-engineering-college-chennai/amp&ved=2ahUKEwivoaChypLyAhUz3jgGHbg7BtcQFjAAegQICxAC&usg=AOvVaw3U6fmTsnuB_Ktx1DsWsSsK&ampcf=1

Where SASTRA UNIVERSITY is one of the top deemed universities in Tamil Nadu. They holds the best infrastructure and provides world class education to the students. They students also get placed in Top companies with high package salary.

The above facilities are also provided by Sri Sairam Engineering College. But SASTRA UNIVERSITY provides these facilities with a step forward.

You can also refer to the link to know more about Sastra University.

https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.careers360.com/university/shanmugha-arts-science-technology-research-and-academy- thanjavur/amp&ved=2ahUKEwiqu9rVypLyAhVRzzgGHXaNBAgQFjAAegQIBBAC&usg=AOvVaw1glBRHfdy8oL5IHfGl_J5q&ampcf=1

According to me SASTRA UNIVERSITY is best.

Hope this information helps you !

BEST OF LUCK!!