Intel Xeon E5 1691 v3 's Advantages
Released 2 years and 4 months late
Higher specification of memory (2133 vs 3)
Larger L3 cache size (35MB vs 15MB)
More modern manufacturing process (22nm vs 32nm)
Intel Xeon E5 4617 's Advantages
Higher base frequency (2.9GHz vs 2.5GHz)
Lower TDP (130W vs 135W)