Intel Xeon E5 2640 's Advantages
Lower TDP (95W vs 255W)
Intel Xeon W 3175X 's Advantages
Released 6 years and 10 months late
Higher specification of memory (2666 vs 3)
Higher base frequency (3.1GHz vs 2.5GHz)
Larger L3 cache size (38.5MB vs 15MB)
More modern manufacturing process (14nm vs 32nm)