Xeon E 2278G 's Advantages
Higher base frequency (3.4GHz vs 2.2GHz)
Lower TDP (95W vs 250W)
Xeon 6731E 's Advantages
Released 5 years and 1 months late
Higher specification of memory (5600 vs 2666)
Newer PCIe version (5 vs 3)
Larger L3 cache size (96MB vs 16MB)
More modern manufacturing process (5nm vs 14nm)