Intel Xeon E5 1428L 's Advantages
Larger L3 cache size (15MB vs 1.5MB)
Intel Xeon D 1521 's Advantages
Released 3 years and 6 months late
Higher specification of memory (4 vs 3)
Higher base frequency (2.4GHz vs 1.8GHz)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (45W vs 60W)