The first thing to note is that these are standard buildings, and they can always be tweaked and modified slightly. TBH it doesn't really matter what the actual contents and floor plan is - so long as the living standard is equivalent and (in my games) the stats are the same.
Fortified Villa - In my Campaign Rules this is the bottom rung of the ladder - It is most suitable as a home for the lord of a small manor, a second home or even a hunting lodge. The Lord's accommodation is little more than a modern two-bedroom house, but with offices, servants and guards. There are probably on a couple of full-time servants living in, but they are supplemented by part-timers from the local community. The barracks house a small contingent of guards and the stables can hold a couple of horses and, perhaps, a small carriage such as a Hansom or a Cabriolet. The second example was designed for a bard, who wanted to host small events. The third example is a simple block-house design, perhaps for less secure areas.
Fortified Manor - This is a step-up from a Fortified Villa. It is most suitable as a home for the lord of a manor, a second home or even a more luxurious hunting lodge. It, quite literally, builds on the Fortified Villa design, and as you will see from the image was originally called an Enhanced Villa. However, there is more accommodation for the Lord of the Manor, more live-in servants and more guards. However, the stables haven't been enlarged and is still limited to holding a couple of horses and, perhaps, a small carriage such as a Hansom or a Cabriolet.