Upload & Sell: Off
For some reason my 5d images always seemed to have more magic; better color and contrast, whereas the NEX dominated in DR. The SOOC higher contrast from the 5d images could simply be the result of the worse DR I suppose, but I had difficulty duplicating the look in post from the 5n files, and preferred the 5d's look in general.
The NEX images will look different than those from the 5d, that is out of question. Trying to get some of the images look like the other might be a very difficult task, and might not apply to all the shooting scenarios. So, if the 5d images are more appealing, I would stick to them. I had a problem when starting out with the NEX in that my images from this one would not look at all like those from the 1Ds. Some things were better ( noise in the shadows is a terrible thing on the 1Ds, and going over ISO 800 was also not very nice ), but colors were clearly different. I had to try and get something I like out of the NEX, and am pretty satisfied with the result, but I had the "advantage" that I had sold the 1Ds :-).