orinos are orinos.. some are darker, some are lighter, some have a little more spangling than the next one. i think where they are caught has little to do with that, i think their color is determined genetically depending on who the parents are. and you can quite often find many different colors and different spangling in the same spawn.
there are different species.. like ocellaris, orino, temensis, monoculous.. etc. but all this bahia kelberi vs. kelberi (and i'm not certain that kelberi are anything more than a very goldy colored ocellaris) and rio meta orino vs. rio negra orino vs. generic orino is just hype to get folks to pay more for the same fish.
i love my peacock bass, and i'll ALWAYS have some. but some of this "which river was it collected from" nonsense is just that.