Xeon E 2126G 's Advantages
Higher base frequency (3.3GHz vs 2.2GHz)
Lower TDP (80W vs 330W)
Xeon 6780E 's Advantages
Released 5 years and 11 months late
Higher specification of memory (6400 vs 2666)
Newer PCIe version (5 vs 3)
Larger L3 cache size (108MB vs 12MB)
More modern manufacturing process (5nm vs 14nm)