Intel Xeon E5503 's Advantages
Lower TDP (80W vs 140W)
Intel Xeon W 2170B 's Advantages
Released 7 years and 9 months late
Higher specification of memory (2666 vs 3)
Newer PCIe version (3 vs 2)
Higher base frequency (2.5GHz vs 2GHz)
Larger L3 cache size (19.25MB vs 4MB)
More modern manufacturing process (14nm vs 45nm)