It's mainly just a gimmick. People will pay out the butt for them just cause they don't always come around. Assuming they don't in your area.
As for substrate difference it's interesting. Some of them are flavored. Which can be a turn off since they do that to cover up RCs. But assuming it tested Lysergic, you are good =)
I found gel tabs I got were quality L =) Very. But that's the crystal obviously.
I personally like them more than blotter but at the end of the day it's not dramatically different. It just looks like candy =)