Intel Xeon E5 4640 's Advantages
Higher base frequency (2.4GHz vs 2.2GHz)
Lower TDP (95W vs 185W)
Intel Xeon Gold 6338N 's Advantages
Released 8 years and 11 months late
Higher specification of memory (2667 vs 3)
Newer PCIe version (4 vs 3)
Larger L3 cache size (48MB vs 20MB)
More modern manufacturing process (10nm vs 32nm)