Xeon W 1390 's Advantages
Released 7 years and 8 months late
Higher specification of memory (DDR4-3200 vs DDR3)
Newer PCIe version (4 vs 3)
More modern manufacturing process (14nm vs 22nm)
Lower TDP (80W vs 130W)
Intel Xeon E5 2687W v2 's Advantages
Higher base frequency (3.4GHz vs 2.8GHz)
Larger L3 cache size (20MB vs 16MB)