Xeon EC5539 's Advantages
Higher base frequency (2.266GHz vs 2.1GHz)
Intel Xeon W 11955M 's Advantages
Released 11 years and 3 months late
Higher specification of memory (3200 vs 1333)
Newer PCIe version (4 vs 2)
Larger L3 cache size (24MB vs 4MB)
More modern manufacturing process (10nm vs 45nm)
Lower TDP (35W vs 65W)