Xeon E5 2650 v4 's Advantages
Released 6 years late
Higher specification of memory (2133 vs 1333)
Newer PCIe version (3 vs 2)
Larger L3 cache size (30MB vs 18MB)
More modern manufacturing process (14nm vs 45nm)
Lower TDP (105W vs 130W)
Xeon X7542 's Advantages
Higher base frequency (2.666GHz vs 2.2GHz)