There are a couple seven stripes. Kigoma is the most comon. They probably cost around the same as the most common frontosa (Burundi).
The more rare and expensive fish are the zaire types. They have a lighter blue tinted background and a darker blue overall. Kapampa, kitumba, moba and some others.
This is pretty much the same with all Frontosas WC (Wild Caught) or F0 are more expensive, F1 is what most people want. Anything else is F2 or TR (Tank Raised)
Breeders don't like mooning or odd stripe patterns. Mooning is a white semicircle at the top of the vertical bars, like the top of the bar is fading away. They want solid black for the whole stripe. All of the stripes should not be split and they should have the same number of stripes on both sides. Some people will even cull fish that have an odd facial stripe that does not match the norm (it might be normal or a mixed fish).
In any case if you breed any of the two varients together, you will get flamed from the avvid breeders and hobbyists that like to troll the boards. If you are going to put different types in the same aquarium, and show your fish off to the others at different forums, you should go with males only.