Intel Xeon X5492 's Advantages
Higher base frequency (3.4GHz vs 2GHz)
Lower TDP (150W vs 270W)
Intel Xeon Platinum 8581V 's Advantages
Released 15 years and 3 months late
Higher specification of memory (DDR5-4800 vs DDR2)
Newer PCIe version (5 vs 2)
More modern manufacturing process (10nm vs 45nm)