I don't understand the sudden surge of lat 64 stuff. Yes it's pretty and durable but it's only expensive ripoffs of Innova and Discraft discs.
The Core resembles a modified Buzzz (which is a modified Wasp, which is a clone of a Roc), but besides that I can't think of any of their other discs that really resemble anything out there. This is especially true if you look at the disc measurements. Even discs that superficially resemble an Innova/Discraft disc have some significant differences when you look at the numbers.
If you are using "ripoff" in a much more generic sense, then honestly the only company in the short history of our sport that made truly original discs was Quest...and they completely sucked.
Also, Latitude is expensive only because they have to export them to the US. The fact that their MSRP is anywhere close to Innova/Discraft means they are making much less profit.