Xeon w3 2535 's Advantages
Released 13 years and 4 months late
Higher specification of memory (4400 vs 3)
Newer PCIe version (5 vs 3)
Higher base frequency (3.5GHz vs 3.1GHz)
Larger L3 cache size (26.25MB vs 8MB)
More modern manufacturing process (10nm vs 32nm)
Intel Xeon E3 1220 's Advantages
Lower TDP (80W vs 185W)