Intel Xeon D 1521 's Advantages
Lower TDP (45W vs 195W)
Intel Xeon Gold 6434 's Advantages
Released 7 years and 2 months late
Higher specification of memory (4800 vs 4)
Newer PCIe version (5 vs 3)
Higher base frequency (3.7GHz vs 2.4GHz)
Larger L3 cache size (22.5MB vs 1.5MB)
More modern manufacturing process (10nm vs 14nm)