SuiteCRM mail vs Mailchimp -- and Potentially Sendy...

I’ve never used mailchimp so looking for someone to enlighten me. Why use Mailchimp if you can email through SuiteCRM directly (I have a SuiteCRM instance on AWS using SES).

So what is the benefit? Analytics? Design? Handling bounces and unsubscribes?

I was thinking of integrating Sendy with SuiteCRM using SES. Have others done this well?