Yes, those are both potentially troublesome damsels. Many damsels start out fine, as juveniles, but get very mean as they mature. The ideal scenario to add these fish is a large tank, already stocked with large, aggressive fish. They will do fine. Unfortunately, damsels are often the first fish added, when cycling, because they are hardy. This lets them get established, and any new fish get harassed, often to death.
I have tried out several of the less aggressive damsels, in an effort to find community-friendly species. The least aggressive of the ones I tried were the Allen's Damsels, also known as Neon Damsels. They are a gorgeous blue, with an extra pop of a blue sheen, that I think is prettier than a Blue Devil. I have a group of five in a 180g. They are very sociable and active, and get along well with each other and other species.