This post is what I would call "a pointless exercise in futility"...
Easy Grumpy. Smile, it's Easter
Clearly, clearly, clearly, and well documented, the 1DX has the best sensor Canon offers. It doesn't have the highest resolution, but it has the best performing sensor.
I think what is confusing is that a casual observer could not pick out the best Canon on stats alone. I mean, if I were at the local electronics mega dealer and a 5D3 were sitting there boasting more mega pixels and a lower price and hyping its low lights capability and the only sacrifice was clicks per second ...... why would I spend double that? I mean I know from reading here and other places the image quality is outstanding on a 1DX. You can see that by what is posted. But on paper it seems like the 1DX loses to the 5D3 except for an extra processor to get the FPS up.
I think it makes sense that the 5D3 would produce a wholly superior picture and be entirely more attractive to consumers. The kind of people with a 1DX aren't after a fancy camera, they need a workhorse. It needs to look good too, but someone shooting a thousand pictures a day probably isn't going to be pixel peeping.
It's like the difference between a highway tractor and a "big truck". You can make a one-ton do some crazy things, push some big numbers, but if you expect an engine to pull 40 tons for half a million miles with minimal fuss, you're looking at a whole new league of equipment.
Concerning sensor performance, I have to wonder if it isn't just better processors giving us lower noise and not the sensors.
Obviously great improvements in sensor design have been made, but with the current generation all three cameras were released almost at the same time and with the same processor. Comparing the 5D3 with the 6D, one produces less noise, and also uses smaller files and shoots 1.5FPS slower. The 1DX shoots twice as fast as the 5D3 and has double the processing power, but uses reduced resolution.
Would a 1DX with double the resolution and halved FPS give the same noise on a per pixel basis?
I guess we'll find out eventually.