Intel Xeon E5 2678 v3 's Advantages
Released 4 years and 10 months late
Newer PCIe version (3 vs 2)
Higher base frequency (2.5GHz vs 1.866GHz)
Larger L3 cache size (30MB vs 12MB)
More modern manufacturing process (22nm vs 32nm)
Intel Xeon L5609 's Advantages
Higher specification of memory (DDR3 vs DDR3)
Lower TDP (40W vs 120W)