Please make the appropriate capital letters and punctuation. Most forum members do, because it improves readability.
The big advantage the D70 has, Patrice mentioned. The D70's ability to x-sync flash at higher than normal shutter speeds, because it has an electronic shutter rather than a mechanical shutter.
Nikon states the x-sync speed as 1/500, but...... Nikon's D40 and the D70s also have the electronic shutter, and can also x-sync flash at high shutter speeds.
The D70s will get you a larger LCD screen (2", instead of 1.8"), and 18 mm focal length popup flash coverage compared to the D70 20 mm focal length popup flash coverage.
6 MP is plenty, but the high ISO performance of the CCD image sensor can make indoor shooting problematic if you are using consumer grade lenses.