Intel Xeon D 1537 's Advantages
Lower TDP (35W vs 140W)
Intel Xeon W 2135 's Advantages
Released 1 years and 9 months late
Higher specification of memory (DDR4-2666 vs DDR3)
Higher base frequency (3.7GHz vs 1.7GHz)
Larger L3 cache size (8.25MB vs 1.5MB)