Intel Xeon E5 2450 v2 's Advantages
Higher base frequency (2.5GHz vs 2GHz)
Lower TDP (95W vs 135W)
Intel Xeon E5 4667 v3 's Advantages
Released 1 years and 9 months late
Higher specification of memory (DDR4-2133 vs DDR3)
Larger L3 cache size (40MB vs 20MB)