Intel Xeon E5 2649 v3 's Advantages
Released 3 years and 5 months late
Higher specification of memory (2133 vs 1333)
More modern manufacturing process (22nm vs 32nm)
Lower TDP (105W vs 130W)
Xeon E7 4870 's Advantages
Higher base frequency (2.4GHz vs 2.3GHz)
Larger L3 cache size (30MB vs 25MB)