In a way.. it's a Nikon 1 with better controls and faster lens.
Err.... Are you referring to the Samsung?
Samsung has entered the game with a Schneider-Kreuznach f1.4 lens's EX2F.
Let's compare the lenses,
RX100's Carl Zeiss Vario-Sonnar f1.8-4.9 28-100mm
EX2F's Schneider-Kreuznach f1.4~ 24-80mm
Olympus's M.Zuiko f1.8-2.9 28-115mm
XZ-1 has the "all time brighter" which Samsung's EX2F will be the brightest and widest with f1.4 and 24mm SWA. With this combo, low-light landscape will be much easier.
RX100 might have the best "branded" lens since it's from Zeiss. Most of you know that "Sonnar" means "bright" and represents large aperture. But definitely not the brightest in telephoto.
I believe EX2F will "theoritically" give the best optical performance with that focal length, less zoom ratio, better image quality, I guess. Schneider-Krueznach from German, almost as famous as Carl Zeiss, I wonder how both of the German glasses perform.
XZ-1's M.Zuiko lens is very sharp even wide open. I own XZ-1 and was impressed at the first sight after some comparison with my Sony Alpha. It was until I replaced my kit lens with a better prime lens, XZ-1 performed nearly identical (if not better) than my kit lens. The focal length and the aperture are very convenient. I meant, where else you could get telephoto-end with f2.9?
I hope RX100 could perform better in low-light with its larger sensor. With enough ambient light, Carl-Zeiss will not disappoint us with its T* coating, but I wonder how about low-light.
S100 and LX5? Come out with something near to the 3 mentioned models, then only we talk.
The Samsung comes with the 'grip'... Looks like its more ergonomic compared with the oly, Sony, canon, panny. And also the tilt screen, which would be great for self or couple portraits.