I installed a Price Pfister fixture in the galley, and it works fine. The marine fixtures usually just have some additional bells and whistles, and are smaller for more compact installations.
I agree with Kai Nui. Definitely no difference. In fact, I'll go one further to say the OEM "marine" fixtures that came with my boat were crap. They were cheap, and you could feel it when you operated the valves. The new non-marine fixtures work much better than the originals.