Xeon EC5539 's Advantages
Higher base frequency (2.266GHz vs 2GHz)
Lower TDP (65W vs 67W)
Xeon D 1746TER 's Advantages
Released 12 years late
Higher specification of memory (2667 vs 1333)
Newer PCIe version (4 vs 2)
Larger L3 cache size (15MB vs 4MB)
More modern manufacturing process (10nm vs 45nm)