For the same day or different days?
For the same day I'd say book Le Cellier first then HDDR... but if you're up at 6am on the dot at 180 days out doing reservations I honestly don't think it would make a big different. HDDR ADR probably takes a little bit longer because of the whole credit card thing...
If it's for two different days (ie: 180+10)... probably pick whichever one is the earliest, since more people would have had the +10 option....