Hmm. That's one of two conflicting bits of information that I've received about gouramis. However, since you're repeating a piece of info about honey gouramis that I know, from experience, is wrong, I have to wonder about the true behavioral profile of dwarf gouramis. That's why I was asking for hands-on experience. It's pretty clear that some commonly held conceptions about certain species' behavior might just be misconceptions.
For example, take my honey gouramis. I've been keeping them for well over a year and the idea of them having even the slightest bit of an aggressive streak is, IME, completely absurd. I've seen in their species descriptions that they can become territorial and aggressive towards each other and other fish and I laugh every time I see it. Mine are always together. They hang out, follow eachother around, sleep next to eachother. The closest thing to "fighting" that I've ever seen them do is hover face to face and wave those little pelvic fins at eachother. It's pretty funny, actually. After that, they forget all about it and resume swimming together. It's because of things like that I'm a little skeptical about the info floating around out there about different species.
So, does anyone have any actual experience with combining these two species?