I can't even be bothered to go into detail, use the forum search function, this has been covered a lot of times.
Bottom line according to a respected person in the trade (Heiko Bleheh) is Blood Parrots are nothing but retarded line bred Midas.
His statement suggested that the original specimens had good mouths, but the deformity has been line bred in.
I think its a obvious statement that the true Golden Severum (line bred version of Heros Efaciatus) cannot breed outside of the Heros genus, any experienced hobbyist can tell you that.
They will pair off with other fish, even lay eggs, but none will be viable.