The rooms are themed differently, there are Alligator Bayou rooms, rustic looking, sleeps up to 5.
Royal Rooms, Very special theming, they do charge a premium.
And Regular Mansion rooms, they are a little more refined in their theme compared to AB.
I would suggest checking out portorleans.org and looking at some of the pictures, they will show you everything you need to know about the theme/decor.
My suggestion to go to the very well maintained POR and POFQ threads. What do you mean by nicer; that is a subjective term if you want a more sophisticated or rustic view.
If you are wondering if it is better than a Motel, it is.