Opteron 6274 's Advantages
Larger L3 cache size (16MB vs 8.25MB)
Lower TDP (115W vs 140W)
Intel Xeon W 2135 's Advantages
Released 5 years and 9 months late
Higher specification of memory (2666 vs 3)
Newer PCIe version (3 vs 2)
Higher base frequency (3.7GHz vs 2.2GHz)
More modern manufacturing process (14nm vs 32nm)