Intel Xeon E5 2667 v3 's Advantages
Higher specification of memory (DDR4-2133 vs DDR4-1866)
Higher base frequency (3.2GHz vs 1.7GHz)
Intel Xeon E5 4648 v3 's Advantages
Released 9 months late
Larger L3 cache size (30MB vs 20MB)
Lower TDP (105W vs 135W)