Intel Xeon E3 1280 v2 's Advantages
Higher base frequency (3.6GHz vs 3.1GHz)
Lower TDP (69W vs 160W)
Intel Xeon E5 2687W v3 's Advantages
Released 2 years and 4 months late
Higher specification of memory (2133 vs 3)
Larger L3 cache size (25MB vs 8MB)