Xeon X3480 's Advantages
Higher base frequency (3.066GHz vs 2.1GHz)
Lower TDP (95W vs 165W)
Intel Xeon Gold 6338T 's Advantages
Released 10 years and 11 months late
Higher specification of memory (3200 vs 1333)
Newer PCIe version (4 vs 2)
Larger L3 cache size (36MB vs 8MB)
More modern manufacturing process (10nm vs 45nm)