Intel Xeon E5 2420 v2 's Advantages
Released 1 years and 6 months late
More modern manufacturing process (22nm vs 32nm)
Lower TDP (80W vs 150W)
Intel Xeon E5 2687W 's Advantages
Higher base frequency (3.1GHz vs 2.2GHz)
Larger L3 cache size (20MB vs 15MB)