Difference between --class-names and --tests flags for apex run test?

[k-capehart]

It seems to me that the --class-names flag for apex run test offers duplicative functionality from the --tests flag.

-n, --class-names=<value>...

  Apex test class names to run; default is all classes.

-t, --tests=<value>...

  Apex test class names or IDs and, if applicable, test methods to run;
  default is all tests.

Both flags support using an Apex test class name, the only difference being that you can also include test methods or IDs with the --tests flag, which --class-names doesn't support.

To confirm, I ran both of these commands in my org and got the exact same result.

sf apex run test --tests TestClass -w 10
sf apex run test --class-names TestClass -w 10

With that being said, should --class-names be deprecated in favor of --tests? Or is there something I'm missing that can be clearly expressed in documentation?