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

After 50yr of wondering, I finally have gotten my hands on (and butthole around) some of these that were UK born. In my opinion, there are very noticeable differences between the two. The texture experience is vastly different for one. Whereas no lube is needed with the glycerin suppository, the gelatin shell of the glycerol needs a splash of water or a drop of lube in order to make it mobile. Plus, the gummy consistency of the core doesn’t lend any help during the insertion as it’s akin to trying to push a piece of cooked spaghetti. Regarding the primary ‘As Advertised’ goal, the effect that the glycerol has literally blows the glycerin ones out of the water. Well, maybe not literally but at least figuratively unless you don’t make it in time. Almost immediately after insertion, the glycerol seems to vanish for about 20m but when it returns, it refuses to be ignored.

I miss the old glycerine suppositories. Can't find them anymore in Australia. They were easier to insert if you didn't have much time or enough privacy. There was no need to wet them with water or any lube. You could just pop into the toilet, unwrap, one leg up and insert easily. I hate the jelly like consistency of the glycerol suppositories, they're too soft to just push in without wetting them first.