Intel Xeon w5 3425 's Advantages
Released 8 years and 5 months late
Higher specification of memory (DDR5-4800 vs DDR3)
Newer PCIe version (5 vs 3)
Higher base frequency (3.2GHz vs 2GHz)
More modern manufacturing process (10nm vs 22nm)
Intel Xeon E5 2686 v3 's Advantages
Larger L3 cache size (45MB vs 30MB)
Lower TDP (120W vs 270W)