Xeon w3 2535 's Advantages
Released 9 years and 11 months late
Higher specification of memory (4400 vs 2133)
Newer PCIe version (5 vs 3)
Higher base frequency (3.5GHz vs 2.5GHz)
More modern manufacturing process (10nm vs 22nm)
Intel Xeon E5 1691 v3 's Advantages
Larger L3 cache size (35MB vs 26.25MB)
Lower TDP (135W vs 185W)