Intel Xeon E5 2650 v2 's Advantages
Higher base frequency (2.6GHz vs 2.1GHz)
Lower TDP (95W vs 120W)
Intel Xeon E5 4660 v3 's Advantages
Released 1 years and 9 months late
Higher specification of memory (DDR4-2133 vs DDR3)
Larger L3 cache size (35MB vs 20MB)