"name" field in metadata vs spec portion of a definition file

The name field appears under metadata as well as spec portion of definition of files for pods and replicasets. What is the difference/impliciation/significance of the name field in the metadata portion vs spec portion?

The name of a resource (of any kind) is part of the metadata of that resource. There are lots of blocks in resource types that can have “names”, but that has nothing to do with the name of the resource. Separate concept entirely.