Opteron 6278 's Advantages
Lower TDP (115W vs 125W)
Xeon W 1390P 's Advantages
Released 9 years late
Higher specification of memory (DDR4-3200 vs DDR3)
Newer PCIe version (4 vs 2)
Higher base frequency (3.5GHz vs 2.4GHz)
Larger L3 cache size (16MB vs 8MB)