I always prefer the C SC. It's a fairly cozy place (even when busy) and the fire place and stone is quite a comfy touch. I do like the self-serve bar and agree - so many more places to tuck away and work/nap/chat.

I don't see a big difference in offerings at F vs. C, but spend enough time in both. F is a very "open" design, so always seems loud and crowded. C always seems better to me, even when crowded.