Intel Xeon E5 2603 v2 's Advantages
Lower TDP (80W vs 120W)
Intel Xeon E5 2676 v3 's Advantages
Released 1 years and 9 months late
Higher specification of memory (2133 vs 3)
Higher base frequency (2.4GHz vs 1.8GHz)
Larger L3 cache size (30MB vs 10MB)