Xeon E 2134 's Advantages
Higher base frequency (3.5GHz vs 2.4GHz)
Lower TDP (71W vs 129W)
Xeon D 2799 's Advantages
Released 3 years and 7 months late
Higher specification of memory (3200 vs 2666)
Newer PCIe version (4 vs 3)
Larger L3 cache size (30MB vs 8MB)
More modern manufacturing process (10nm vs 14nm)