Abstractions go over things. An abstraction is something fundamentally layered on top of another thing. Two things cannot be abstractions of each other. If you encounter such a concept and you still think they are both abstractions then it is you who is not making sense.
If you don’t know what I’m talking about I’m sorry I can’t help you. Truly I’m really sorry and I apologize that I can’t help you. Thanks you reading. Good bye.