What is the difference between anna university and srm university in the means of certificate value?

One is a government college and one is a private University. Both have their own merit. If you’re seeking for intense academic growth, Anna University with give you that along with a good job ahead In a great company. Srm University will give you holistic developed and also get you a good prospect at a job.
But since Anna University is been there longer than srm University and obviously the criteria for getting into Anna is harder, the long term value of a certificate from Anna University might be higher than srm. But srm is catching up soon, so you bet on that too.