--The whole fleet--A nice family picture, with the military on the left and the utilitarian on the right, to compare scales.
From left to right(Large ships only):S.S. Masse-D'Arme, S.S. Tribunal, S.S. Rose-Des-Vents, S.S. Menhire, S.S. Obelisque, S.S. Prevoyant, S.S. Scarabee, S.S. Etoile-Du-Nord.----Trivia----
The similarities become obvious once placed side to side, the tower-styles all share their anatomy. From top to bottom they constitute the crown, the head, the waist, the hip, the skirt and the spear.
The Spear, or 'spike', is intended as a landing anchor for orbital drops. It took a while before planets were implemented to test their effectiveness and while they do not impale the ground as intended, they do successfully crumple up and brake the fall, keeping all thrusters intact.
The main purpose of the skirt is to reduce the profile of the main thrusters in combat, but it also helps with stability in a crash-landing.
Something you might have notice in a few ship images it that they often have a two command chairs, one pointing forward, one pointing up. In truth every tower ship has them, this give them a dual nature, both vertical and horizontal. The horizontal stance is used for travel, taking advantage of the main thruster bank and the vertical stance is used for combat and docking maneuvers, being easier to turn and more precise in maneuvering.
Tower-style ships are nice in that they are easy to build The two axis symmetry greatly accelerate building and the verticality makes floor planning easy as every floor is rather small and can be entirely dedicated to a specific use, without having to cut and draw rooms.
The Mass-D'Arme, the Rose-Des-Vents, the Menhire, the Scarabee and the Etoile-Du-Nord were built from the inside out. The Tribunal, the Obelisque and the Prevoyant were built from the outside in.
Tower Ships can revolve in combat to keep exposing more weapons and spread damage evenly.
S.S. Menhire and S.S. Obelisque are known to cause server crash. The Menhire because of it's ridiculous amount of weapons firing all at once, the Obelisque because of it's mere existence.
The Menhire, the Prevoyant and The Obelisque all contain an experimental kinetic shield made from gravity generatore spread through the ship resulting in a roughly 400m radius bubble that eject any passing material. The Obelisk has an updated model producing a hollow bubble, every generator has a short range canceller which create a neutral inner field keeping unseated crewmen from being splattered against the walls at 20g. However the various tugging gravity fields create uneven ripples, causing the crew to stumble and walk around like drunkards, earning it the nicknames 'Drunkard Shield' and 'Booze Field'.
They are named by either their intended role, for example Wind Rose and North Star are exploring ships, or whatever their shape reminds me of, the Scarabee for example is reminiscent of a scarab with it's six solar panels and large back end.
None of the ships have a class name, mostly because I there's no real point in having multiples in Space Engineer. So they were all considered unique and given personal name.
Why are they named in french? You might ask. Well, because I am... And I really wanted to confuse english players online.