Intel Xeon E5603 's Advantages
Lower TDP (80W vs 120W)
Intel Xeon W 2140B 's Advantages
Released 6 years and 10 months late
Higher specification of memory (2666 vs 3)
Newer PCIe version (3 vs 2)
Higher base frequency (3.2GHz vs 1.6GHz)
Larger L3 cache size (11MB vs 4MB)
More modern manufacturing process (14nm vs 32nm)