QUOTE(Everdying @ Oct 11 2011, 06:52 PM)
diff sensor.
xornet from the specs seems to be adns-3050...no big brand using it yet...but seems to be made for even more extremely low sens

spawn is adns-3090, which is basically the same as the adns-3888 DA BE sensor.
the xornet driver makes more sense tho, dpi steps from 500, 1000 and 2000.
stupid spawn is 800, 1800 and 3500.
wonder wtf is so hard for them to offer fully adjustable dpi.
ADNS-3090 is actually different...
3090 has mouse-prediction/correction.
I believe it's easy to make fully adjustive dpi but it will not perform at optimum levels thus it's limited at those DPI which are probably the most stable.
An example will be ADNS-9500, it has fully adjustable DPI have has unstable 5% positive/negative acceleration.