Intel Xeon W3670 's Advantages
Higher base frequency (3.2GHz vs 2.1GHz)
Lower TDP (130W vs 140W)
Intel Xeon E7 8870 v3 's Advantages
Released 4 years and 10 months late
Higher specification of memory (1866 vs 3)
Newer PCIe version (3 vs 2)
Larger L3 cache size (45MB vs 12MB)
More modern manufacturing process (22nm vs 32nm)