Intel Xeon E5 2666 v3 's Advantages
Released 113 years and 10 months late
Higher base frequency (2.9GHz vs 2.8GHz)
Lower TDP (135W vs 160W)
Intel Xeon E5 2693 v3 's Advantages
Higher specification of memory (2133 vs 2133)
Larger L3 cache size (30MB vs 25MB)