Intel Xeon D 1548 's Advantages
Released 4 years and 9 months late
Newer PCIe version (3 vs 2)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (45W vs 60W)
Xeon L5639 's Advantages
Higher specification of memory (1333 vs 4)
Higher base frequency (2.133GHz vs 2GHz)
Larger L3 cache size (12MB vs 1.5MB)