In between both the colleges Asansol college of engineering is better for cs and placemnts , for mlre info visit below

https://collegedunia.com/college/12891-asansol-engineering-college-aec-asansol/placement

https://collegedunia.com/college/58094-purulia-government-engineering-college-pgec-purulia

Hello aspirant,
I am here for helping you.
As your douaibt is about better college from Asansol and Purulia engineering college for computer science branch.
So I am providing you a link below where you can compare these both colleges and can know about their rating, ranking, recommendation,etc and always remember that you should always give your first priority to high rated college and those college will be good for specific branch where number of seats available for that particular branch are limited , consider that they take only bright students.
Link of career360 college compare tool is given below:
https://www.careers360.com/compare-colleges
I hope it will help you........
For more queries you can upvote me and can ask in the comment box.
Best of luck.