Intel Xeon E5 2680 's Advantages
Larger L3 cache size (20MB vs 15MB)
Intel Xeon E5 1660 v2 's Advantages
Released 1 years and 6 months late
Higher specification of memory (DDR3-1866 vs DDR3)
Higher base frequency (3.7GHz vs 2.7GHz)
More modern manufacturing process (22nm vs 32nm)