Intel Xeon D 1557 's Advantages
Released 5 years and 11 months late
Higher specification of memory (4 vs 3)
Newer PCIe version (3 vs 2)
More modern manufacturing process (14nm vs 45nm)
Lower TDP (45W vs 130W)
Intel Xeon W3530 's Advantages
Higher base frequency (2.8GHz vs 1.5GHz)
Larger L3 cache size (8MB vs 1.5MB)