Brasiliensis are more aggressive than those other geos. The others guys are right.... there is a lot of mislabelling with many of the eartheaters. It's tough at small sizes because they don't show adult coloration and even as adults the differences are slight. I would go for surinamensis, they get some nice red/blue colors. In my eartheater tank I have Surinamensis (or abalios), jurupari, and leucostica. They get along great.
Here is pics of my surinamensis types. Finally starting to color up a bit.


Here is pics of my surinamensis types. Finally starting to color up a bit.

