Opteron 4386 's Advantages
Higher base frequency (3.1GHz vs 2.7GHz)
Lower TDP (95W vs 325W)
Xeon w7 3555 's Advantages
Released 11 years and 8 months late
Higher specification of memory (4800 vs 3)
Larger L3 cache size (75MB vs 8MB)
More modern manufacturing process (10nm vs 32nm)