Does every authoritative dns server have to have the same records?

Hey everyone,

I have an important email domain and I’m looking to add a secondary DNS provider so one provider can’t take it down. I’m thinking I’m going to use a Primary/Primary setup with NS1 and maybe Google Cloud DNS.

My question is could I only recreate the important records like the MX and TXT records on the secondary provider and leave the rest to only one provider? In my use case NS1 has url forwarding for the apex and www domains and I don’t want to set it up again on Google Cloud DNS. From how I understand it, it would be fine since the resolver would keep trying until it gets an answer.

Thanks