Intel Xeon E5 1691 v3 's Advantages
Lower TDP (135W vs 350W)
Intel Xeon Platinum 8558P 's Advantages
Released 9 years and 3 months late
Higher specification of memory (DDR5-4800 vs DDR4-2133)
Newer PCIe version (5 vs 3)
Higher base frequency (2.7GHz vs 2.5GHz)
Larger L3 cache size (260MB vs 35MB)
More modern manufacturing process (7nm vs 22nm)