What is the main difference is between glycerin and glycerol suppositories?

Does anyone know what the main difference is between glycerin and glycerol supps? I ordered some glycerol ones from ibspot and they came from the UK. Aside from them being a much more jelly type consistency and weighing in a 4g vs the US 2g max, I’m not really sure what the difference is.

I'm pretty sure they're the same thing.

Both intended to force a massive bowel movement!

Theres a subtle difference between the two. Glycerol is more purified than glycerin which is 95% glycerol with some added impurities

https://us.typology.com/library/glycerol-or-glycerin-is-there-a-difference

Both r same