Intel Xeon D 1581 's Advantages
Released 4 years and 10 months late
More modern manufacturing process (14nm vs 32nm)
Lower TDP (65W vs 95W)
Xeon E7 4807 's Advantages
Higher specification of memory (1333 vs 4)
Higher base frequency (1.866GHz vs 1.8GHz)
Larger L3 cache size (18MB vs 1.5MB)