Intel Xeon W 2133 's Advantages
Released 2 years and 5 months late
Higher specification of memory (DDR4-2666 vs DDR3)
Higher base frequency (3.6GHz vs 2.2GHz)
Larger L3 cache size (8.25MB vs 1.5MB)
Intel Xeon D 1520 's Advantages
Lower TDP (45W vs 140W)