To me a Ringer is a when there is a small patch of the the normal pattern washed out with usually a white patch, but I had a yellow belly BP that had a yellow patch. A paradox is more of the appearance of another gene "leaking" through in patches in various degrees on parts of the body. Here are a couple extreme examples below of what comes to mind when I hear the names(none of the pictures below belong to me, they are a result of a quick Google search)
Paradox
https://imgur.com/gallery/Q5IVX
Ringer
https://ballpython.ca/portfolio-posts/ringer/