Spit out vs. regurgitation

[Vypyrz]

I'm wondering where the line is between a snake spitting out a rodent and a snake regurgitating. 20 minutes? An hour? 24 hours? I guess I'm wondering at what point the rodent becomes "partially digested".

I would have to say that the entry point of the stomach would be the line between the two.
If the prey makes it all the way into the stomach and then gets expelled... It is a regurgitation.
If it doesn't make it all the way into the stomach before expulsion... It is a spit-out.

Personally, the line between the two is alot more simply defined for me.
If I open the enclosure and gag from the smell... It's a regurgitation.
If not... It's a spit-out...