Intel Xeon E5 1691 v3 's Advantages
Larger L3 cache size (35MB vs 30MB)
Lower TDP (135W vs 210W)
Xeon w5 2545 's Advantages
Released 9 years and 11 months late
Higher specification of memory (4800 vs 2133)
Newer PCIe version (5 vs 3)
Higher base frequency (3.5GHz vs 2.5GHz)
More modern manufacturing process (10nm vs 22nm)