Intel Xeon X5675 's Advantages
Higher base frequency (3.066GHz vs 2.2GHz)
Lower TDP (95W vs 270W)
Intel Xeon Gold 6554S 's Advantages
Released 12 years and 10 months late
Higher specification of memory (DDR5-5200 vs DDR3)
Newer PCIe version (5 vs 2)
Larger L3 cache size (180MB vs 12MB)
More modern manufacturing process (10nm vs 32nm)