George I agree, oftentimes the details tell the whole story and are quite interesting besides.
I have to admit to being curious though...if I remember correctly, Tamu advocates for the two sub species being the same..I think.
Here:
http://fisheries.tamu.edu/pond-management/species/bluegill/Interesting reading here also...note to Al: check out the part where the CNBG from the manatee river section are described as being more plate shaped than the specimens from the St Johns river system.....
http://forum.nanfa.org/index.php/topic/12901-lepomis-macrochirus-purpurescens-vs/Not claiming either is correct, just some interesting reading material.