In the wild orange midas live in deeper water than the barred midas, they have to do this cus if they lived in the shallow areas there just easy targets for birds and other predators, in order to get the territory of there choice they have to be far more aggressive then the barred variety, yet this behaviour doesn't come through when we keep them in what is essentially a puddle.
Then if you take the tank size we put our fish in, someone has a pair of convicts in a standard 180 gal those fish have 4 x the width and 12 x the length to house a pair of dovii in something similar your going to need a 24 by 8 ft tank how aggressive those dovii will be is any guess.
There are just to many variables between how a fish acts in nature to how it acts in the confines of a tank that make this question pointless, the best we can do is just go on a fish by fish bases.