Intel Xeon E5 2648L 's Advantages
Larger L3 cache size (20MB vs 1.5MB)
Intel Xeon D 1520 's Advantages
Released 3 years late
Higher specification of memory (DDR3 vs DDR3)
Higher base frequency (2.2GHz vs 1.8GHz)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (45W vs 70W)