Intel Xeon D 1548 's Advantages
Released 5 years and 8 months late
Newer PCIe version (3 vs 2)
More modern manufacturing process (14nm vs 45nm)
Lower TDP (45W vs 130W)
Intel Xeon W3530 's Advantages
Higher specification of memory (DDR3 vs DDR3)
Higher base frequency (2.8GHz vs 2GHz)
Larger L3 cache size (8MB vs 1.5MB)