Intel Xeon D 1521 's Advantages
Lower TDP (45W vs 225W)
Intel Xeon w7 2475X 's Advantages
Released 7 years and 3 months late
Higher specification of memory (DDR5-4800 vs DDR3)
Newer PCIe version (5 vs 3)
Higher base frequency (2.6GHz vs 2.4GHz)
Larger L3 cache size (37.5MB vs 1.5MB)
More modern manufacturing process (10nm vs 14nm)