Intel Xeon E5 1691 v3 's Advantages
Higher base frequency (2.5GHz vs 2GHz)
Lower TDP (135W vs 240W)
AMD EPYC 7663 's Advantages
Released 6 years and 6 months late
Higher specification of memory (DDR4-3200 vs DDR4-2133)
Newer PCIe version (4 vs 3)
Larger L3 cache size (256MB vs 35MB)