score:2
When I was in India, they didn't write on my evisa. The passport stamp will provide the exact same information you described. However, you need to keep your visa with you wherever you go for the full extent of your stay which may be up to 60 days. After you arrive home you are free to discard your visa. Just save your visa number and the dates of travel in case you want to visit India again because you will need that information for the application process.
Upvote:-2
Yes, definitely. It is a document that proves you are within the period of time allowed.