'True gts' means nothing, green terror is just a common name for both the rivulatus and Stalsbergi. I've even seen acara labeled as green terror.
People seem to confuse the two because of the white/silver colour variant of the rivulatus. But apart from that, they are quite different in appearance
One of the juvies is male, fingers crossed for the other two.
I picked up 7x 4inch Metynnis lippincottianus ( spotted silver dollars ) today for next to nothing. They aren't as common as the standard silver dollar around here so that was a score and a half