From what I've heard, these 2 hospitals are very similar - I am pretty sure they both have private rooms and a smaller, more personal feel to their Maternity wards. We delivered at Reston for DD#1 and will this time around too. We loved it. They practically had to kick us out. The nurses were nice, they had LCs available and I got a massage my last day there for free.
I delivered DD at Fair Oaks and #2 will also be delivered there. It was a GREAT experience. All of the rooms are private and mine was HUGE. The L&D room was nice and my nurse was awesome.
It sounds like you can't go wrong at either place. Which one is closer to you? I think that's how I'd base my decision
I live in between both hospitals and plan to go to Fair Oaks..mostly because that is where my OBGYN delivers. ?I spent a lot of time there last summer with a friend who gave birth and whose baby ended up in the NICU for a few weeks. ?The nursing staff have been wonderful and everyone seems so nice! ?