I’m always amazed when somebody asks which vehicle is best. My response is always that it depends on where you are in the game. Different vehicles have different uses and thus none is better than the rest (except maybe Cyclops).
SeaGlide - technically it isn’t a vehicle
Advantages: You get it early and it is useful through the entire game. No depth restrictions. With swim charge fins it will charge the battery while moving. You can carry it in your inventory and pull it out any time. You can use it inside very tight spaces.
Disadvantages: No onboard storage. No onboard oxygen generation. No onboard defenses.
Seamoth
Advantages: It is the fastest vehicle in the game and can outrun creatures that threaten it. The solar generator means you never run out of power. Upgradeable onboard storage. Best vehicle through most of the game after you build it.
Disadvantages: Crush depth of 900 meters means it can only get as far down as the Lost River then you leave it at home for the rest of the game. Warpers can teleport you out of it. Have to get out to do anything. Cannot access resources from inside.
Prawn Suit
Advantages: Configurable arms. Can reach the lowest depths on the map. Only way to mine large deposits. Best vehicle very late in the game. Can defend itself against creatures. Can put resources into storage without leaving vehicle.
Disadvantages: Slow. Travels on the bottom with limited ability to go up. Can get stuck in caves. No ability to regenerate power until very late in the game. Warpers can teleport you out of it.
Cyclops
Advantages: It is a mobile base with massive amounts of storage capacity. Can place most base items inside including plants, fabricator, etc. What it cannot carry you can take the resources with you and build when you stop. Can transport another vehicle. Very few creatures can damage it. Warpers cannot touch you inside. Can reach the deepest depths in the game.
Disadvantages: No ability to regenerate power until very late into the game. Cannot maneuver through shallow water. Some areas are very difficult, if not impossible, to take it into.
