It's less detailed than either of those. Kiss Me Hardy is a fair simulation without being over the top (if you want lots of detail, the Post Captain or Signal Close Action are what you want).
Galleys & Galleons is really aimed more at Renaissance than Napoleonic, and has fantasy elements although you don't have to use those. It uses a modified version of the 'song of' activation system, which is OK but which I find leads to a slowish game. Fighting Sail is quick play.