Hull Rupture offers three starships, and the choice is not cosmetic. Each hull has its own module layout, its own systems, its own damage tolerance, and its own acceptable risk ceiling. Combined with six modes and four modifiers, that gives 72 distinct run configurations before you even factor in which route you pick.
Read the hull against the modifier you want to run, not in isolation. A defensive hull with a wide, forgiving damage tolerance suits a first clear; a tighter, more aggressive hull with sharper native systems suits a Spikes run where crew damage multipliers are doing the heavy lifting. The route map pushes you toward one of two shapes of run — a safe route that stretches your mission length, or a lucrative route that compresses it — and hulls differ in how well they absorb that compression.
With three ships, six modes and four modifiers, the combinations multiply faster than any one axis can be learned, and that is the design intent: the geometry of your hull and the geometry of your defence are the same problem. A hull that forces a long corridor is a hull where one good kill zone covers a lot, and a hull that offers short parallel routes is a hull where you need layered coverage. Understanding which kind of hull you are on is the single highest-leverage piece of knowledge in the game.