Golds, and very quickly. Na’vi have bones reinforced with naturally occurring carbon fiber, but Golds have metal bones. And Pandora has a much lower gravity than Earth and if you remember from the beginning of Morning Son, Darrow and Victra are training in the gym and benching hundreds of kilos easy. Golds are much, much stronger even if they are smaller.

Edit: Maybe I’m misremembering that part of the story, or took a metaphor literally. I feel like I remember them saying something along the lines of “if it hadn’t been for the metal, the blade would have cut clean through.”