Opteron 6366 HE 's Advantages
Released 2 years and 8 months late
Higher specification of memory (1866 vs 3)
Larger L3 cache size (8MB vs 4MB)
More modern manufacturing process (32nm vs 45nm)
Intel Xeon E5503 's Advantages
Higher base frequency (2GHz vs 1.8GHz)
Lower TDP (80W vs 85W)