Xeon EC5539 's Advantages
Lower TDP (65W vs 129W)
Xeon D 2799 's Advantages
Released 12 years late
Higher specification of memory (3200 vs 1333)
Newer PCIe version (4 vs 2)
Higher base frequency (2.4GHz vs 2.266GHz)
Larger L3 cache size (30MB vs 4MB)
More modern manufacturing process (10nm vs 45nm)