Opteron 6348 's Advantages
Released 2 years and 9 months late
Higher specification of memory (1866 vs 1333)
Higher base frequency (2.8GHz vs 2.266GHz)
Larger L3 cache size (8MB vs 4MB)
More modern manufacturing process (32nm vs 45nm)
Xeon EC5539 's Advantages
Lower TDP (65W vs 115W)