Xeon 6740E 's Advantages
Released 2 years and 4 months late
Higher specification of memory (6400 vs 3200)
Newer PCIe version (5 vs 4)
Larger L3 cache size (96MB vs 30MB)
More modern manufacturing process (5nm vs 10nm)
Xeon D 2799 's Advantages
Lower TDP (129W vs 250W)