In response to the folks here repeating that the D600 beats the 6D, here's a feature comparison that applies to the kind of photography I do, which is a mix of travel, landscapes, & weddings (usually as a backup photog). For other folks it's surely different but here's my take:
So, I've got 4 points for Canon & 2 points for Nikon, without taking into account the fact that I'm already a Canon customer. Looks like they've spec'd it right for geeks like me. For me, the D600's better AF & built-in flash just don't outweigh better high ISO performance (the most important thing for me after handling) & the built-in GPS & wifi.
Regardless of my conclusions, bear this in mind: in this economy, the less expensive camera wins pretty often...
- 20mp vs 24mp: the smaller the files the better. I'm going to run the thing in MRAW mode most of the time anyway. Point Canon.
- High ISO performance: top native ISO on the 6D is 25.6k. It's 6400 on the Nikon. 6D is certainly not two stops better than D600 but if they've got the balls to give it native 25.6k then I'm betting it's at least somewhat better. Point Canon.
- AF: D600 has 39 points vs. 11 for Canon. Point Nikon.
- Metering: too early to call it, but they had both better be pretty good. Draw.
- Shooting speed: Nikon is 1fps faster, which is too close for me to care as they're both fast enough for me. I'd award Nikon a point if I could definitively figure out if D600 has DX high-speed mode or not but AFAICT it doesn't. Draw.
- Max shutter speed & flash sync: Both not too hot but not horrible either. Draw.
- Storage: I prefer CF to SD & they both use SD to keep the size down. D600 has two of them, but I really don't care. Draw.
- Weather sealing: The basic seals on my 40D have been good enough to keep me out of trouble so far. Draw.
- Built-in flash: point Nikon (but my 270EX II will always be in my bag...).
- Built-in GPS & Wifi: point Canon. I hesitate to award two here as they are both optional on the Nikon.
- Of course, 6D takes my EF mount lenses & EX flashes, but I won't award any points here. It's also worth noting that the D600 will drive old-school Nikon screwdriver lenses.
- Price: 6D is a couple hundred simoleons cheaper & under the ephemeral double-deuce mark. Point Canon.
So, I've got 4 points for Canon & 2 points for Nikon, without taking into account the fact that I'm already a Canon customer. Looks like they've spec'd it right for geeks like me. For me, the D600's better AF & built-in flash just don't outweigh better high ISO performance (the most important thing for me after handling) & the built-in GPS & wifi.
Regardless of my conclusions, bear this in mind: in this economy, the less expensive camera wins pretty often...