Intel Xeon E5 2603 v2 's Advantages
Released 3 years and 6 months late
Newer PCIe version (3 vs 2)
More modern manufacturing process (22nm vs 32nm)
Lower TDP (80W vs 130W)
Intel Xeon X5677 's Advantages
Higher base frequency (3.466GHz vs 1.8GHz)
Larger L3 cache size (12MB vs 10MB)