Intel Xeon w7 3455 's Advantages
Higher base frequency (2.5GHz vs 2.1GHz)
Lower TDP (270W vs 330W)
Intel Xeon Platinum 8558 's Advantages
Released 10 months late
Higher specification of memory (DDR5-5200 vs DDR5-4800)
Larger L3 cache size (260MB vs 67.5MB)
More modern manufacturing process (7nm vs 10nm)