I don't believe there's a difference. Just different terminology from sellers.
So far, I've gotta give a thumbs up to all of the Puresmoker CaSH juices I've tried.
Everyone raves about the Janty liquids, as well, but I haven't tried any, yet.
I burn the the cartridges like crazy, so I'd be in big trouble if it weren't for my stash of juices.