Like Richyb stated, it will be much more of a village feel then Perkins Rowe, which is very urban. Most of the land will be used for single family townhomes around the village center and single family detached homes outside the town center. When you say Camellia drive in Lafayette, I'm assuming you are referring to River Ranch, which should be similar to Rouzan (both are TNDs). Rouzan is scheduled to have a Library, Church and school, none of which is found in River Ranch. Also, I would not expect any mega mansions like there are in River Ranch.
I think the best example for what Rouzan will be is Harbor Town in Memphis. Here is additional information Harbor Town. This is very similar in size, density, and commercial as Rouzan. Also, Looney, Ricks, and Kiss actually finished Harbor Town and are part of the design team for Rouzan.