Xeon W 1390P 's Advantages
Released 11 years and 2 months late
Higher specification of memory (3200 vs 1333)
Newer PCIe version (4 vs 2)
Higher base frequency (3.5GHz vs 1.866GHz)
More modern manufacturing process (14nm vs 45nm)
Xeon L7555 's Advantages
Larger L3 cache size (18MB vs 16MB)
Lower TDP (95W vs 125W)