On edit: We were confused at first by the numbers that were showing in the FS tool, but we just figured it out!
Traditional Continental : 30 Textures
Traditional Winchester : 32 Textures
Traditional Alderley : 29 Textures
Traditional Adams : 29 Textures
Houseboat 1 : 19 Textures
Houseboat 2 : 27 Textures
Houseboat 3 : 22 Textures
Houseboat 4 : 14 Textures
The number does show higher because of the specular and normal maps.
All the Traditional Houses also share the same Door, Control Panel, Blinds, Floor, Ceiling and Window Textures.