Xeon E7 8870 's Advantages
Higher specification of memory (1333 vs 3)
Larger L3 cache size (30MB vs 20MB)
Intel Xeon E5 2667 v2 's Advantages
Released 2 years and 5 months late
Higher base frequency (3.3GHz vs 2.4GHz)
More modern manufacturing process (22nm vs 32nm)