Xeon W 1390 's Advantages
Released 10 years and 1 months late
Higher specification of memory (DDR4-3200 vs DDR3)
Newer PCIe version (4 vs 3)
Larger L3 cache size (16MB vs 8MB)
More modern manufacturing process (14nm vs 32nm)
Intel Xeon E3 1220 's Advantages
Higher base frequency (3.1GHz vs 2.8GHz)