The main difference that separates the Pirate Faction from the others is the horizontal and elongated design. Pirate ships are incredibly wide and not vertically sound. Since the ship's design develops a barbell-like shape in the mid-stage, it can be incredibly hard to design a ship which maximizes grid potential.
The main color scheme for the Pirate ships are their distinct Red and Grey color along with its threatening skull. The hybrid ship branch unlocked at level 10 is the Scavenger. (PLEASE NOTE THAT BY PRESENT DAY, MOST SHIPS HAVE SLIGHTLY DIFFERENT LAYOUTS AND MORE DETAILED ART IN THE ACTUAL GAME.)