The difference when it is serious, and it is time to buy a book for $59 that states "THIS IS A PRICE GUIDE FOR CASINO CHIPS" on the cover, then a few pages in, it states.... hey its all fun and games, it's not really a price guide, it's a Fun guide. And you don't want anyone to think, you might not be a "Fun Guy, with his , Fun Guide, ....because you paid a bunch of money that didn't know if it was fun or not, it was just hard earned cash, and you wanted to know what a chip was worth, and you are told by several people in "The Know" the information about a cousin who worked security at The Horseshoe had a bunch of chips to flood the market with, but rather that make the prices according to the information that , just about everyone be me knew, in the latest guide, this information was omitted???? There is no conssistency here, it's like everyones just making it up as they go. I am far to stupid to ever figure this out.