Intel Xeon E3 1285 v4 's Advantages
Released 5 years and 3 months late
Higher specification of memory (DDR3-1866 vs DDR3)
Newer PCIe version (3 vs 2)
Higher base frequency (3.5GHz vs 2.266GHz)
Larger L3 cache size (6MB vs 4MB)
More modern manufacturing process (14nm vs 45nm)
Intel Xeon E5507 's Advantages
Lower TDP (80W vs 95W)