Intel Xeon E5 2603 's Advantages
Lower TDP (80W vs 175W)
Xeon 6523P B 's Advantages
Released 12 years and 11 months late
Higher specification of memory (5600 vs 3)
Newer PCIe version (5 vs 3)
Higher base frequency (2.5GHz vs 1.8GHz)
Larger L3 cache size (96MB vs 10MB)
More modern manufacturing process (5nm vs 32nm)