Intel Xeon E5 2690 's Advantages
Higher base frequency (2.9GHz vs 2.5GHz)
Intel Xeon E5 2678 v3 's Advantages
Released 2 years and 10 months late
Higher specification of memory (2133 vs 3)
Larger L3 cache size (30MB vs 20MB)
More modern manufacturing process (22nm vs 32nm)
Lower TDP (120W vs 135W)