Xeon E7 2870 's Advantages
Higher specification of memory (1333 vs 4)
Higher base frequency (2.4GHz vs 1.9GHz)
Larger L3 cache size (30MB vs 1.5MB)
Intel Xeon D 1528 's Advantages
Released 4 years and 7 months late
More modern manufacturing process (14nm vs 32nm)
Lower TDP (35W vs 130W)