Intel Xeon D 1531 's Advantages
Released 3 years and 8 months late
Higher base frequency (2.2GHz vs 1.8GHz)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (35W vs 70W)
Intel Xeon E5 2648L 's Advantages
Higher specification of memory (DDR3 vs DDR3)
Larger L3 cache size (20MB vs 1.5MB)