Xeon E7 4870 's Advantages
Higher base frequency (2.4GHz vs 2.3GHz)
Lower TDP (130W vs 145W)
Intel Xeon E5 2696 v3 's Advantages
Released 3 years and 5 months late
Higher specification of memory (2133 vs 1333)
Larger L3 cache size (45MB vs 30MB)
More modern manufacturing process (22nm vs 32nm)