Intel Xeon D 1520 's Advantages
Released 2 years and 10 months late
Higher specification of memory (4 vs 3)
Higher base frequency (2.2GHz vs 2GHz)
More modern manufacturing process (14nm vs 32nm)
Intel Xeon E3 1125C 's Advantages
Larger L3 cache size (8MB vs 1.5MB)
Lower TDP (40W vs 45W)