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 Amazon then once you open the email it looks something like "Amazon.in <auto-confirm@amazon.in> "
Here Amazon.in is the company name or the company identity or "From" who is sending the email to the recipient whereas "auto-confirm@amazon.in" is the "Sender" or the identity email address.