Intel Xeon E3 1220L v3 's Advantages
Higher specification of memory (1600 vs 4)
Larger L3 cache size (4MB vs 1.5MB)
Lower TDP (13W vs 35W)
Intel Xeon D 1531 's Advantages
Released 2 years and 2 months late
Higher base frequency (2.2GHz vs 1.1GHz)
More modern manufacturing process (14nm vs 22nm)