Xeon EC5509 's Advantages
Lower TDP (85W vs 350W)
Intel Xeon Platinum 8558P 's Advantages
Released 13 years and 10 months late
Higher specification of memory (4800 vs 1066)
Newer PCIe version (5 vs 2)
Higher base frequency (2.7GHz vs 2GHz)
Larger L3 cache size (260MB vs 8MB)
More modern manufacturing process (7nm vs 45nm)