Xeon w3 2535 's Advantages
Released 9 years and 5 months late
Higher specification of memory (4400 vs 4)
Newer PCIe version (5 vs 3)
Higher base frequency (3.5GHz vs 2.2GHz)
Larger L3 cache size (26.25MB vs 1.5MB)
More modern manufacturing process (10nm vs 14nm)
Intel Xeon D 1520 's Advantages
Lower TDP (45W vs 185W)