Others are not so easy. I would guess yours would be called a  Snakeskin Variegated. But it is also a Multicolor Snakeskin if you see three or more colors in the tail. If you see two colors in the tail, it is a Bicolor snakeskin.

Some guppy enthusiasts don't like the IFGA approved show classes, which is where I tried to draw those from and then Google search for examples. (Multicolor came right to mind though.) The feeling among a few guppy people is that the IFGA people are discouraging new colors and forms of guppies. That is somewhat true, but roundtails are now an experimental class. Other classes exist now, which didn't exist in the past. Swords seem more popular than before. Go to European or Asian clubs and look at their classes. Certainly they have more room for various kinds of swordtails and pintails. There no doubt is a cultural component in terms of selecting classes and descriptions of guppies.

In order to encourage more participation they have classes by males of a color, females of a color, breeder's classes:  Males (5 matched) Females (3 matched) and a novice class for someone who has never won in a show and junior classes for young people.

Take a look at the IFGA site or The World Guppy Association show results. The points standings will give you an idea of how dedicated some of these folks are in maintaining and developing certain color forms of guppy.

http://www.ifga.org/show_section.htm
http://www.world-guppy.de/

Also go to commercial guppy or discus sites and look at the names given what is essentially the same fish in different situations. It is not common, but I have seen the same killies offered for sale twice by the same persons under a scientific name and a location name. Once in a great while some clown will offer a fish under an outdated popular or scientific name from the 50s or 60s.

With a few goofballs selling under home made names; it is easy to spend big money in different places for the same fish! We urge buyers to be well informed. But if sellers make up any old name and miss-lead us, chaos reigns.

Also shows have to have some order and divisions, or else everyone enters the same class and 140 entries are competing for the same 1st, 2nd and 3rd.

As a runner at auctions, I have quietly brought attention to a number of interspecies crosses - thereby negating higher priced bidding for an incorrect pedigree. Also will take a bag to the seller and ask them if theirs is the correct name for the fish. The guy who is best at correcting labels is cichlid and livebearer guru Mike Schadle. It is amazing how smoothly he can update nomenclature and popular names while auctioning the fish!

So maybe we can suggest that by IFGA standards these are such and such. Or this fish was sold by... hatchery as ...

In the U.S. the cichlid group, the International Betta Congress (famous for their experimental classes) and the killie group publish lists of name and indeed books on killie classification. Scientific groups (fishbase for instance) and other set up whole web site on taxonomy (the classification of fishes).

So I don't think that, if egos can be put aside and if an effort can be made for consistent description of patterns, that classes are a bad idea. And they are still wise enough/ clever enough to have catch-alls like AOC - any other color among guppy people or AOV - any other variety among others, so that no one gets left out.