I really like this mod because I can actually build the ships with parts. The other boat mod had more parts, and more impressive ships (huge aircraft carriers), but I could only use the stock ships included with the mod. I'm happy to sacrifice a bit of size for general ease of use, tbh. This one has a more Kerbal feeling to it as well. The other one felt more like human ships thrown into the Kerbal world. In retrospect, I should have used the actual names of the mods... I hope what I said makes sense.