2011 socket

Newer manufacturing process   22 nms   vs   32 nms   A newer manufacturing process allows for a more powerful, yet cooler running processor

Much lower typical power consumption   105.63W   vs   172.6W   Around 40% lower typical power consumption

Higher clock speed   3.4 GHz   vs   3.2 GHz   More than 5% higher clock speed

Slightly higher turbo clock speed   3.9 GHz   vs   3.8 GHz   Around 5% higher turbo clock speed

Significantly better performance per watt   15.52 pt/W   vs   6.18 pt/W   More than 2.5x better performance per watt

Better PassMark (Overclocked) score   8,128.1   vs   6,119.5   Around 35% better PassMark (Overclocked) score

Better 3DMark11 physics score   12,790   vs   11,200   Around 15% better 3DMark11 physics score

Better PassMark score   13,496   vs   12,084   More than 10% better PassMark score

Better performance per dollar   3.4 pt/$   vs   2.2 pt/$   Around 55% better performance per dollar

Marginally newer   Jul, 2013   vs   Nov, 2011   Release date over 1 years later

Much lower annual home energy cost   31.32 $/year   vs   56.96 $/year   More than 45% lower annual home energy cost

Slightly better PassMark (Single core) score   2,037   vs   1,949   Around 5% better PassMark (Single core) score

Much lower annual commercial energy cost   113.88 $/year   vs   177.83 $/year   More than 35% lower annual commercial energy cost