Xeon L5639 's Advantages
Higher base frequency (2.133GHz vs 2.1GHz)
Lower TDP (60W vs 120W)
Intel Xeon w3 2423 's Advantages
Released 12 years late
Higher specification of memory (4400 vs 1333)
Newer PCIe version (5 vs 2)
Larger L3 cache size (15MB vs 12MB)
More modern manufacturing process (10nm vs 32nm)