Intel Xeon Platinum 8558 's Advantages
Released 2 years and 8 months late
Higher specification of memory (DDR5-5200 vs DDR4-2933)
Newer PCIe version (5 vs 4)
Larger L3 cache size (260MB vs 54MB)
More modern manufacturing process (7nm vs 10nm)
Intel Xeon Platinum 8351N 's Advantages
Higher base frequency (2.4GHz vs 2.1GHz)
Lower TDP (225W vs 330W)