Nvidia Driver Comparison 178.13 Vs 178.15 

Introduction: From on the naming of the drivers you'd probably notice very little difference, and to be honest there probably is other than some bug fixes found with some machines (DV settings mainly).

Testing methods

Benchmarks used: 

• F.E.A.R (built in performance tester)
• 3D Mark 06 and Vantage
• Crysis War Head (benchmark application from here, using the ambush map) 
• S.T.A.L.K.E.R Clear Sky For IQ testing, along with F.E.A.R MP

 Hardware used:

• Intel Q6600 Overclocked to 3Ghz
• Abit IP-35 E
• 4GB of OCZ Plat at 667Mhz (CL4)
•  Nvidia GeForce 9600GT
• Creative X-Fi Xtreme Music

 Software:

• Microsoft Windows Vista x64 Ultimate 
• Fraps, for screen captures.