Xeon 6740E 's Advantages
Released 9 years and 9 months late
Higher specification of memory (6400 vs 2133)
Newer PCIe version (5 vs 3)
Larger L3 cache size (96MB vs 35MB)
More modern manufacturing process (5nm vs 22nm)
Intel Xeon E5 1691 v3 's Advantages
Higher base frequency (2.5GHz vs 2.4GHz)
Lower TDP (135W vs 250W)