Xeon E5 2650 v4 's Advantages
Released 4 years late
Higher specification of memory (2133 vs 3)
Larger L3 cache size (30MB vs 10MB)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (105W vs 130W)
Intel Xeon E5 1620 's Advantages
Higher base frequency (3.6GHz vs 2.2GHz)