Guild Hall Preview and the purchased ones?

I may be missing something here, I don't really know lol.

But I'm an officer of a guild and a member in another. Anyway i decided to take the guild hall tour because I was board. And the ones in the tour are a little different from the actuall ones? Like the biggest one for example, that top room in there has a slight different layout compared to the version players get. I'm sure there are other little differences but i won't bother looking lol.

Anyway is there a reason for this? It is suppose to show you exactly what it would look like if you bought it isn't it?