Thanks ewest, my fish are definitely classic HBG. I can see a difference in the photos you posted, I just don't see one in Bruce's photos. To me, both of Bruce's photos display classic HBG as well. That's why I was curious as to what was seen to suggest otherwise.
If we eliminate the variances due to reciprocal crosses, and discount coloration as a steadfast method of identification due to differing water clarity from one BOW to another, what are we left with to differentiate by? It would appear that a rounded shape is not indicative of GG, so I must be missing something. What is it? I'll be wondering the rest of the day now!