Intel Xeon E5503 's Advantages
Lower TDP (80W vs 270W)
Intel Xeon w5 3435X 's Advantages
Released 12 years and 11 months late
Higher specification of memory (4800 vs 3)
Newer PCIe version (5 vs 2)
Higher base frequency (3.1GHz vs 2GHz)
Larger L3 cache size (45MB vs 4MB)
More modern manufacturing process (10nm vs 45nm)