Intel Xeon D 1521 's Advantages
Released 2 years and 5 months late
Higher base frequency (2.4GHz vs 1.8GHz)
More modern manufacturing process (14nm vs 22nm)
Intel Xeon E3 1230L v3 's Advantages
Higher specification of memory (1600 vs 4)
Larger L3 cache size (8MB vs 1.5MB)
Lower TDP (25W vs 45W)