Xeon E7 2870 's Advantages
Higher base frequency (2.4GHz vs 1.8GHz)
Intel Xeon E5 2675 v3 's Advantages
Released 3 years and 5 months late
Higher specification of memory (2133 vs 1333)
Larger L3 cache size (40MB vs 30MB)
More modern manufacturing process (22nm vs 32nm)
Lower TDP (110W vs 130W)