Intel Xeon E5 2609 v2 's Advantages
Released 5 years late
Higher base frequency (2.5GHz vs 2.4GHz)
More modern manufacturing process (22nm vs 45nm)
Lower TDP (80W vs 90W)
Xeon X7458 's Advantages
Higher specification of memory (667 vs 3)
Larger L3 cache size (16MB vs 10MB)