$877K for Sorano can't be accurate, it must be for their model home. If you go on Standard Pacific's site, you'll see most of the Move-In ready homes are in the low to mid 700s.
Personally, I hated the layout at Sorano, so I purchased a plan 2 at Amber. It looks like La Floresta's floorplans are more similar to Amber, in terms of "open concept".
I think resale value on a Sorano might be higher than La Floresta just due to the Blackstone factor. I was able to buy my Amber Plan 2 at $615K base with $10K in option upgrades; I'm definitely not complaining about the appreciation Not to mention being in a 3.5% 30yr fixed rate.
Good luck! Let me know if you have any questions regarding Brea.
Brea is more convenient for us than Irvine or other cities, but prices have become a joke. Amber, which was sold out a year ago, is at the $800Ks and Sorano wants up to $877K BASE for one of their new homes.