Xeon E7 4870 's Advantages
Higher base frequency (2.4GHz vs 2.1GHz)
Lower TDP (130W vs 140W)
Intel Xeon E7 8870 v3 's Advantages
Released 4 years and 2 months late
Higher specification of memory (1866 vs 1333)
Larger L3 cache size (45MB vs 30MB)
More modern manufacturing process (22nm vs 32nm)