Intel Xeon E7 4820 v3 's Advantages
Lower TDP (115W vs 250W)
Intel Xeon Gold 6542Y 's Advantages
Released 8 years and 6 months late
Higher specification of memory (DDR5-5200 vs DDR3)
Newer PCIe version (5 vs 3)
Higher base frequency (2.9GHz vs 1.9GHz)
Larger L3 cache size (60MB vs 25MB)
More modern manufacturing process (10nm vs 22nm)