Same great food menu and beer selection of the original Common Market, but with more sitting room inside and out. Also the overall look of the place is slightly more polished.
I have started going to this CM more often for the sole reason that the seating is so much better and I love getting work done on my laptop while sitting out in the fenced in patio area.
They also seem to have a lot of weekly events, though I'm usually not around later at night to witness them. I have seen some decent live music and DJs here though.