Intel Xeon E3 1270 v2 's Advantages
Higher base frequency (3.5GHz vs 2.2GHz)
Larger L3 cache size (8MB vs 1.5MB)
Intel Xeon D 1531 's Advantages
Released 3 years and 6 months late
Higher specification of memory (4 vs 3)
More modern manufacturing process (14nm vs 22nm)
Lower TDP (35W vs 69W)