What is difference between AWS S3 Select and AWS Athena?

Question

I am trying to understand what is difference between AWS Athena service and the newly released S3 select (still in preview).

How are use cases different for both of those? It seems both help in selecting partial data from S3.

Answer 1

Also looks like we are missing one major thing:

S3 Select operates on only one object while Athena to run queries across multiple paths, which will include all files within that path.