Intel Xeon E7 8870 's Advantages
Higher base frequency (2.4GHz vs 2.2GHz)
Larger L3 cache size (30MB vs 15MB)
Intel Xeon E5 2420 v2 's Advantages
Released 2 years and 5 months late
More modern manufacturing process (22nm vs 32nm)
Lower TDP (80W vs 130W)