Intel Xeon W 2135 's Advantages
Released 10 years and 6 months late
Higher specification of memory (2666 vs 667)
Newer PCIe version (3 vs 1)
Higher base frequency (3.7GHz vs 2.8GHz)
More modern manufacturing process (14nm vs 90nm)
Opteron 8220 's Advantages
Lower TDP (95W vs 140W)