Should Lightsail DNS configuration match settings in Route 53?

Question

Should AWS Lightsail's DNS Zone contain the same DNS records as my Route 53 configuration including NS, A and MX?

I am confused because this feel redundant.

Answer 1

This is indeed redundant.

You shouldn't need Lightsail DNS configured at all unless you are not using Route 53. Except in limited, advanced configurarion scenarios, the records in one or the other will just be ignored.