Upload & Sell: On
I've been doing some comparisons the last few days, using the same lenses on two 1D2's and one 1Ds2 (50/2.5 Macro and 100L). The point of my exercise is to equalize white balance between the bodies.
I shot all images in RAW at ISO 200, and for the same subject magnification, the photos looked essentially the same, meaning it was almost impossible to tell which was shot with 8MP and which was shot at 16MP. I thought that was pretty remarkable for 100% details. Color, details, edge sharpness -- all were pretty equal. Granted, the 1Ds2 images were more magnified and overall have better detail, but still, when cropped to same subject size, very little gained with the 1Ds2. (The images were only imported to LR with the native settings.)
I certainly prefer the 1D2 over the 5D when the whole package of controls and build quality is considered. The 8MP images aren't far behind the 5D's near-13MP, especially for people, events and general activites. Only detailed techical subjects (products, architecture, landscape) have a big benefit from the higher MP full frame bodies. So I use the 1D2 whenever I can.