Intel Xeon D 1518 's Advantages
Lower TDP (35W vs 255W)
Intel Xeon W 3175X 's Advantages
Released 3 years and 10 months late
Higher specification of memory (DDR4-2666 vs DDR3)
Higher base frequency (3.1GHz vs 2.2GHz)
Larger L3 cache size (38.5MB vs 1.5MB)