Preferring Empire's setting to Napoleon's focus on one commander

What is the difference between Empire: Total War and Napoleon: Total War?

Napoleon develops Empire's systems further. The preference here is for Empire because Napoleon feels too focused on its central figure and his mythology.

Napoleon: Total War builds on Empire and is considered the more advanced game. The personal preference here is still for Empire. Napoleon's concentration on its central commander feels too invested in his mythology, while Empire provides more of the historical setting the player wants. The preference concerns the games' emphasis and appeal.