keeping more than one species of guapote (jag, motaguense, loisellei, friedrichsthalli, dovii or bay snook) together in one tank unless it's a very large tank. by very large I mean 180 gallons or larger...preferably larger. more than one of these species together usually will not get along so that's why you're having or had problems.
as for which is more territorial...you can't really say that one species is more territorial than the other....each are hyper territorial and require a huge amount of space for their own but to what degree and how much territory they need is really based on the individual fish's personality.
