Have you looked at potential resale value? While none of us can predict the market, and with one being new there's no history there. But how about if you look at what the high price was for that area for similar homes in 2005/2006? Does one have a higher priced area than the other?
I think it's just a personal opinion of which area you like better. Natomas is more conforming, and there's certainly nothing wrong with Natomas.