Opteron 6272 's Advantages
Released 1 years and 9 months late
Larger L3 cache size (16MB vs 4MB)
More modern manufacturing process (32nm vs 45nm)
Xeon EC5539 's Advantages
Higher specification of memory (1333 vs 3)
Higher base frequency (2.266GHz vs 2.1GHz)
Lower TDP (65W vs 115W)