Nikon D300S vs D7000 - Our Analysis - Compare digital cameras - Snapsort
i don't think it is fair to say that the D300s is the same as the D3100, there are obvious differences in the D3100, D5100, D7000 and the D300s such as megapixel count, sensor, build quality, etc. also, the ISO performance of a D7000 is better than the D3...