In this short YouTube video, I looted an Inferno Spectrum design for my Spectrum Ship in one of the Empyrean Booty boxes. According to the DarkOrbit forum, the chances of getting a ship design are better than other types of loot boxes out there. Crafting the keys for one of them was worth the time and effort.
In comparison to other ships, I would say the Spectrum ship is quite strong shield-wise. Players should consider this type of ship when is necessary to complete missions that require being able to survive alone in the DarkOrbit universe.