Intel Xeon X5667 's Advantages
Higher base frequency (3.066GHz vs 2.1GHz)
Lower TDP (95W vs 250W)
Intel Xeon Platinum 9221 's Advantages
Released 9 years and 1 months late
Higher specification of memory (DDR4-2933 vs DDR3)
Newer PCIe version (3 vs 2)
Larger L3 cache size (71.5MB vs 12MB)
More modern manufacturing process (14nm vs 32nm)