Intel Xeon E5 4650 's Advantages
Higher base frequency (2.7GHz vs 2GHz)
Lower TDP (130W vs 135W)
Intel Xeon E5 4667 v3 's Advantages
Released 3 years and 1 months late
Higher specification of memory (DDR4-2133 vs DDR3)
Larger L3 cache size (40MB vs 20MB)
More modern manufacturing process (22nm vs 32nm)