Xeon E7520 's Advantages
Larger L3 cache size (18MB vs 15MB)
Lower TDP (95W vs 120W)
Intel Xeon w3 2423 's Advantages
Released 12 years and 11 months late
Higher specification of memory (4400 vs 1333)
Newer PCIe version (5 vs 2)
Higher base frequency (2.1GHz vs 1.866GHz)
More modern manufacturing process (10nm vs 45nm)