Xeon EC5539 's Advantages
Higher specification of memory (1333 vs 3)
Lower TDP (65W vs 130W)
Intel Xeon W3670 's Advantages
Released 6 months late
Higher base frequency (3.2GHz vs 2.266GHz)
Larger L3 cache size (12MB vs 4MB)
More modern manufacturing process (32nm vs 45nm)