Intel Xeon E5 2660 's Advantages
Higher base frequency (2.2GHz vs 2.1GHz)
Larger L3 cache size (20MB vs 15MB)
Lower TDP (95W vs 120W)
Intel Xeon w3 2423 's Advantages
Released 10 years and 11 months late
Higher specification of memory (DDR5-4400 vs DDR3)
Newer PCIe version (5 vs 3)
More modern manufacturing process (10nm vs 32nm)