Xeon EC5539 's Advantages
Higher specification of memory (1333 vs 4)
Higher base frequency (2.266GHz vs 2.1GHz)
Larger L3 cache size (4MB vs 1.5MB)
Intel Xeon D 1541 's Advantages
Released 5 years and 9 months late
Newer PCIe version (3 vs 2)
More modern manufacturing process (14nm vs 45nm)
Lower TDP (45W vs 65W)