The "From" in the email represents your identity like your company name or a company title whereas the "Sender" in the email represents your identity email address.
For example: If you receive an order confirmation email from an ecommerce company with the name as bigecom.com then once you open the email it looks something like "Bigecom<auto-confirm@bigecomcom> "
Here Bigecom is the company name or the company identity or "From" who is sending the email to the recipient whereas "auto-confirm@bigecomcom" is the "Sender" or the identity email address.