Xeon E 2278GE 's Advantages
Higher base frequency (3.3GHz vs 2.4GHz)
Lower TDP (80W vs 129W)
Xeon D 2799 's Advantages
Released 2 years and 8 months late
Higher specification of memory (3200 vs 2666)
Newer PCIe version (4 vs 3)
Larger L3 cache size (30MB vs 16MB)
More modern manufacturing process (10nm vs 14nm)