Opteron 6180 SE 's Advantages
Higher specification of memory (1333 vs 3)
Higher base frequency (2.5GHz vs 2.3GHz)
Larger L3 cache size (12MB vs 8MB)
Opteron 6276 's Advantages
Released 9 months late
More modern manufacturing process (32nm vs 45nm)
Lower TDP (115W vs 140W)