There is a modest complication in comparing cameras, and that is weight and balance in one's hands and arms. within limits, added weight and good balance is stabilizing. For example, I noticed after getting a D3s and when combined with the 24-70 f/2.8, it was remarkably stable in my hands and yielded great results hand-held even when unexpected due to borderline shutter-speed & aperture combinations. Results were better than with the same lens but using the D300 (adjusting for DX/FX issues). I could see the difference (subtle) in the viewfinder as well.