Intel Xeon E5 1691 v3 's Advantages
Released 2 years and 4 months late
Higher specification of memory (DDR4-2133 vs DDR3)
Larger L3 cache size (35MB vs 8MB)
Intel Xeon E3 1240 v2 's Advantages
Higher base frequency (3.4GHz vs 2.5GHz)
Lower TDP (69W vs 135W)