I agree and disagree with some of what has been said haha Where is the JD love!? Ive housed both fish, never bred them but in my experience, green terrors much like any other fish vary greatly when it comes to personality, i had one that was super shy so i traded it and bought another one, a male that was extremely outgoing and would greet me at the front of the tank and jump for food and everything you could ask for in a fish haha but with that said, I do think that is is very true that Green Terrors are a much more delicate fish in terms of water quality, stress...ect Mine ended up dying from that wasting away disease crap, didnt respond to any meds i tried, i was pretty pissed. anyways, now i have a big beautiful male JD and he is a little more timid, but will still jump out of the water for food, he is fiesty, digs a TON, and loves his food. I also think that the jacks are much more hardy individuals. With all that being said with the pros and cons of both fish i really dont think you can go wrong with a quality individual of either species, but its up to you, and what is your favorite color haha good luck man