How to tell difference between payment keys and staking keys by looking at them?

So, I’m aware that there types of keys ( part of the list here )

payment.vkey payment verification key
payment.skey payment signing key
stake.vkey staking verification key
stake.skey staking signing key

I have a file labeled stake.vkey and a file labeled stake.skey

How would I know that my stake.vkey is not actually payment.vkey and that my stake.skey is not actually payment.skey ?

Is there something unique about the cborHex that would tell me this?