Opteron 6348 's Advantages
Higher base frequency (2.8GHz vs 2.7GHz)
Lower TDP (115W vs 325W)
Xeon w7 3555 's Advantages
Released 11 years and 9 months late
Higher specification of memory (4800 vs 1866)
Newer PCIe version (5 vs 2)
Larger L3 cache size (75MB vs 8MB)
More modern manufacturing process (10nm vs 32nm)