Intel Xeon E5 2603 's Advantages
Lower TDP (80W vs 95W)
Intel Xeon E5 2640 v2 's Advantages
Released 1 years and 6 months late
Higher base frequency (2GHz vs 1.8GHz)
Larger L3 cache size (20MB vs 10MB)
More modern manufacturing process (22nm vs 32nm)