Xeon E7 4870 's Advantages
Higher specification of memory (1333 vs 4)
Higher base frequency (2.4GHz vs 2GHz)
Larger L3 cache size (30MB vs 1.5MB)
Intel Xeon D 1548 's Advantages
Released 4 years and 7 months late
More modern manufacturing process (14nm vs 32nm)
Lower TDP (45W vs 130W)