Intel Xeon D 1548 's Advantages
Released 4 years and 9 months late
Newer PCIe version (3 vs 2)
Higher base frequency (2GHz vs 1.6GHz)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (45W vs 80W)
Intel Xeon E5603 's Advantages
Higher specification of memory (DDR3 vs DDR3)
Larger L3 cache size (4MB vs 1.5MB)