Xeon EC5549 's Advantages
Higher specification of memory (1333 vs 4)
Intel Xeon E3 1280 v5 's Advantages
Released 5 years and 8 months late
Newer PCIe version (3 vs 2)
Higher base frequency (3.7GHz vs 2.533GHz)
More modern manufacturing process (14nm vs 45nm)
Lower TDP (80W vs 85W)