Opteron 6348 's Advantages
Released 2 years and 8 months late
Higher specification of memory (1866 vs 3)
Higher base frequency (2.8GHz vs 2.266GHz)
Larger L3 cache size (8MB vs 4MB)
More modern manufacturing process (32nm vs 45nm)
Intel Xeon E5507 's Advantages
Lower TDP (80W vs 115W)