Intel Xeon E5 2609 v3 's Advantages
Higher specification of memory (DDR4-1600 vs DDR3)
Larger L3 cache size (15MB vs 1.5MB)
Intel Xeon D 1531 's Advantages
Released 1 years and 2 months late
Higher base frequency (2.2GHz vs 1.9GHz)
More modern manufacturing process (14nm vs 22nm)
Lower TDP (35W vs 85W)