Xeon E5 2650 v4 's Advantages
Released 1 years and 6 months late
Larger L3 cache size (30MB vs 25MB)
More modern manufacturing process (14nm vs 22nm)
Lower TDP (105W vs 135W)
Intel Xeon E5 1681 v3 's Advantages
Higher base frequency (2.9GHz vs 2.2GHz)