On average, Asus' factory-overclocked Strix GTX 960 performs 5% better than a Radeon R9 285, and a little closer to the GeForce GTX 770 than the 760. A reference-clocked GeForce GTX 960 would have been slower than Asus' specimen, which could have made it slightly slower than, but still competitive with, a reference-clocked Radeon R9 285.
On average, Asus' factory-overclocked Strix GTX 960 performs 5% better than a Radeon R9 285, and a little closer to the GeForce GTX 770 than the 760. A reference-clocked GeForce GTX 960 would have been slower than Asus' specimen, which could have made it slightly slower than, but still competitive with, a reference-clocked Radeon R9 285.