They are 2 different species. The dwarf gourami is Colisa lalia, the honey gourami has had it's name changed a couple of times so you could see it as Colisa sota, Colisa chuna or Trichogaster chuna.
The common name that confuses me is honey dwarf gourami. Which one is that supposed to be?
As for peacefulness, Ive only ever had honey gourami, and the ones I've had over the years have been peaceful, both among themselves and towards other fish. When the males build bubblenests, the females usually have bits if tail missing, but mine have always healed quickly. If they lay eggs, the male chases away any fish that gets too near, but usually doesn't make contact, he just swerves at the last moment.