Intel Xeon X5675 's Advantages
Lower TDP (95W vs 130W)
Intel Xeon E5 2687W v2 's Advantages
Released 2 years and 7 months late
Newer PCIe version (3 vs 2)
Higher base frequency (3.4GHz vs 3.066GHz)
Larger L3 cache size (20MB vs 12MB)
More modern manufacturing process (22nm vs 32nm)