Intel Xeon D 1587 's Advantages
Released 4 years and 10 months late
More modern manufacturing process (14nm vs 32nm)
Lower TDP (65W vs 130W)
Xeon E7 4870 's Advantages
Higher specification of memory (1333 vs 4)
Higher base frequency (2.4GHz vs 1.7GHz)
Larger L3 cache size (30MB vs 1.5MB)