Well every site I looked up had a different explanation. The most common was one is wild and the other is only bread in captivity.
Again you are talking about two SEPARATE species so the whole one is wild and the other is captive thing carries no weight.
There are 5 naturally occurring variants of efasciatus and 3 common ( Gold, White and Albino) man made variants. Most fish in the Heros genus all reach an adult size of 8-10".
Heros appendiculatus is commonly referred to as the "Green Severum" how ever it is commonly mistaken for Heros severus which is a the "Green mouth brooding Severum" that reaches a size of 12".
Your "Gold Red Spot" is still a Heros Efasciatus "False Severum", Just selectively bred from the Gold variant to make the red more present. The GRS will still hit that 8-10" mark. There's no need to have a degree, just be very intelligent about the sources you trust for information.
Search FishBase is a good place to start.