Intel Xeon w7 3445 's Advantages
Released 7 years and 3 months late
Higher specification of memory (4800 vs 4)
Newer PCIe version (5 vs 3)
Higher base frequency (2.5GHz vs 2.4GHz)
Larger L3 cache size (52.5MB vs 1.5MB)
More modern manufacturing process (10nm vs 14nm)
Intel Xeon D 1521 's Advantages
Lower TDP (45W vs 270W)