But it just depends. Mayo for a good sandwich, bologna or ham, turkey. Miracle Whip for deviled eggs and potato salad. Miracle Whip adds that zing to a good dish being made.
They both should be in a fridge ready to go. You can't have just one. Always be prepared.
Ive always hated miracle whip. When I was growing my poorest friends only had miracle whip and I just don't care for it. I also can't stand Macaroni and Cheese.