Intel Xeon E5603 's Advantages
Lower TDP (80W vs 300W)
Intel Xeon Platinum 8558U 's Advantages
Released 12 years and 10 months late
Higher specification of memory (4800 vs 3)
Newer PCIe version (5 vs 2)
Higher base frequency (2.0GHz vs 1.6GHz)
Larger L3 cache size (260MB vs 4MB)
More modern manufacturing process (7nm vs 32nm)