Xeon X3440 's Advantages
Higher base frequency (2.533GHz vs 2.1GHz)
Lower TDP (95W vs 250W)
Intel Xeon Platinum 9221 's Advantages
Released 9 years and 7 months late
Higher specification of memory (2933 vs 1333)
Newer PCIe version (3 vs 2)
Larger L3 cache size (71.5MB vs 8MB)
More modern manufacturing process (14nm vs 45nm)