Understanding `Context.Tag`, `Context.GenericTag`, and `Effect.Tag` Differences

Whats the difference between:

Context.Tag

Context.Tag

Context.GenericTag

Context.GenericTag

, and

Effect.Tag

Effect.Tag

? The only difference I can decipher is that with

Context.Tag

Context.Tag

and

Effect.Tag

Effect.Tag

you get opaque types because they are classes?

Understanding `Context.Tag`, `Context.GenericTag`, and `Effect.Tag` Differences - Effect Community