In the test that had been done, Snow Leopard looks up consistently in testing the fastest time-based, with the booting process greater speed, toughness in the frame rate to produce a better in game play and a significant advantage in the rendering Cinebench.

The battery appears to be clearly better under Snow Leopard. And they even still in existence hardware optimized for OS X. In the picture above has been shown the bar graph of complete testing procedure. With so hopefully will be able to give an exact picture before deciding to apply to the 2 operating systems on hardware devices you have.