Intel Xeon E5507 's Advantages
Lower TDP (80W vs 140W)
Intel Xeon W 2133 's Advantages
Released 7 years and 5 months late
Higher specification of memory (DDR4-2666 vs DDR3)
Newer PCIe version (3 vs 2)
Higher base frequency (3.6GHz vs 2.266GHz)
Larger L3 cache size (8.25MB vs 4MB)
More modern manufacturing process (14nm vs 45nm)