Sleep Paralysis vs Old Hag Syndrome

Hello,

What are the differences between these two? I've read these two are similar, but I feel they're not. I recall having sleep paralysis with my stomach facing down. I was aware of my surroundings, but wasn't able to move. There was no presence when this happened, nor felt strangled. Now, the Old Hag Syndrome seems similar to sleep paralysis in a way that your body can't move and in a state where you can apprehend your surroundings, but this is when things are different when an old hag, a shadow figure, or even a demon is in the room. There were no entities in my room when I had sleep paralysis. Thus, I feel Sleep Paralysis and Old Hag Syndrome are dissimilar. What are your thoughts?

This syndrome dates back 2000 years ago with depictions of entities sitting on top of their victims.


Here's another.


Last one.


Here's a documentary on this Old Hag Syndrome: Most terrifying documentary on the ENTITY : Shadow men Old hag

Has anyone experienced this Old Hag Syndrome that would like to share?

Edit: I was thinking this topic goes under Mysteries, Myths & Legends.

Blessed be,
Lepus