I had both at once.
Here is why I kept the Chamonix.
The cost for a new Canham DLC is $2450. The cost for a new Chamonix 45N-1 is $800.
The average ebay price for a used Canham is about $1200. The average ebay price for a used Chamonix is $1100
To me, the Chamonix seemed a bit more rigid and offered all of the movements that I needed for portrait and landscape work.
The big catch, and to me, this is huge, is going to be service/repair for the camera. Keith Canham has exceptional customer service and turn around time. I am unsure what to do with my Chamonix, other than send it back to China, which will not be quick or cheap. I've emailed Hugo Zhang a few times about this and suggested he get something going here in the USA, because repairs will certainly be needed as more and more of these cameras come in the USA.
The Canham is a wonderful camera with lots of bellows and movements. But, for what I do, the Chamonix was the better camera when it came to cost and usability. The Chamonix weighs about 3.5 pounds and is very well made. Also, they are very hard to find and are quite nice to look at.
Just my opinion.