However in this situation, we are reproducing the same sized image from the same area of sensor, ergo the dof is the same.
That would be true with film, but it's not true with digital. Besides focal length, subject distance, and aperture, DoF is also affected by CoC. So, the crop sensor actually gives a (slightly) shallower DoF when the first three factors are all constant.
Daniel, that is quoting out of context. Neuro was comparing a cropped 5DII image to a 7D's.If you'll print 24x36" and hang on your wall, the 7D winsSo an un-cropped 5d3 file printed to 24*36" has no real world win over a 7d? Or, have I lost something in the ambiguity?
Correct - I am talking about the situation where you're 'focal length limited' and using a crop sensor for the greater (apparent) reach, whereas if you had a FF sensor you'd have to crop the image to the FoV of the APS-C sensor, to get the desired framing. Doesn't matter if it's 5DII or 5DIII - in both cases, the cropped FF image will be similar in IQ to the APS-C image, but have fewer MPs.
If you can get closer or use a longer lens (or you decide to show more of the background), the FF camera will 'win' and that's exactly what I stated in my post.