Being completely honest, both act nearly the same. Both species have a weird sense of superiority over other dragons, both will declare war in each other for anything, and both planned to take advantage of dragons for the acquisition of territory. The difference is the nightwings lived on a volcanic island with dwindling food supply that was about to erupt, the other lived in what most dragons would call an icy wasteland. The nightwings felt forced to take a new territory, thought the rainforest was the best option, and decided they also wanted to enslave the rainwings, or at least force them out. (I think the enslaving part was mostly Darkstalker). Either way, both wanted to completely screw over other dragons for their own benefit. The nightwings had the option of negotiating with the rainwings for part of their territory, which the rainwings would have probably said yes, but their sense of superiority over other dragons keeps them from doing that. The Icewings felt compelled to war with the other territories because Blaze offered territory and they felt they could push her around. Both are bad in their own ways, but the difference is that Icewings would have likely got dragged into the war at some point like the rainwings did. The nightwings were waiting for the best candidate to help them invade another territory.
Caption this Meme
