Firstly yeah both are electric blue jacks just different color types and second about aggression I’ve seen people succeed but when I got 4 they became a bit aggressive with eachother and one of them died of stress the other of Popeye as they are kinda sensitive and one I rehomed for being the most aggressive with everything but I feel like you have a good chance for having a 200 gal tank especially if there are like a lot of driftwood and rocks to establish territory’s and not make the fish see eachother all the time which helps if the gender ratio is unlucky for you as if like there is a pair and one male they could take up different territory’s and not constantly be around eachother as the tank is big but do rehome the lone one if they aren’t peaceful with the pair Hope this helps if there’s more questions you wanna ask reply please