Intel Xeon W 2135 's Advantages
Higher base frequency (3.7GHz vs 3.3GHz)
Xeon E 2456 's Advantages
Released 6 years and 4 months late
Higher specification of memory (4800 vs 2666)
Newer PCIe version (5 vs 3)
Larger L3 cache size (18MB vs 8.25MB)
More modern manufacturing process (10nm vs 14nm)
Lower TDP (80W vs 140W)