Intel Xeon E5 2603 's Advantages
Released 2 years late
Newer PCIe version (3 vs 2)
More modern manufacturing process (32nm vs 45nm)
Lower TDP (80W vs 115W)
Opteron 6168 's Advantages
Higher base frequency (1.9GHz vs 1.8GHz)
Larger L3 cache size (12MB vs 10MB)