Intel Xeon E5 4627 v3 's Advantages
Higher base frequency (2.6GHz vs 2.1GHz)
Lower TDP (135W vs 330W)
Intel Xeon Platinum 8558 's Advantages
Released 8 years and 6 months late
Higher specification of memory (DDR5-5200 vs DDR4-2133)
Newer PCIe version (5 vs 3)
Larger L3 cache size (260MB vs 25MB)
More modern manufacturing process (7nm vs 22nm)