Intel Xeon W3670 's Advantages
Higher base frequency (3.2GHz vs 3.1GHz)
Lower TDP (130W vs 255W)
Intel Xeon W 3175X 's Advantages
Released 8 years and 5 months late
Higher specification of memory (DDR4-2666 vs DDR3)
Newer PCIe version (3 vs 2)
Larger L3 cache size (38.5MB vs 12MB)
More modern manufacturing process (14nm vs 32nm)