IMO there is not much or a very few BG influence (genes) in the fish of the last picture that is a little out of focus. There is a noticeable genetic variation of each species if one looks closely at the individuals.
Notice the length of the pectoral fin. It extends to the same length as the pelvic fin. As BG influence increases in hybrids the pectoral fin elongates. Pectoral fin of pure strain BG goes back to the origin of the anal fin.
Another feature of the fish in the pictures is the length of the mouth. Ideally in pure green sunfish the posterior end of the upper jaw should extend well beyond the front of the eye, usually to the pupil.


aka Pond Doctor & Dr. Perca Read Pond Boss Magazine -
America's Journal of Pond Management