Xeon E 2456 's Advantages
Released 11 years and 7 months late
Higher specification of memory (DDR5-4800 vs DDR3)
Higher base frequency (3.3GHz vs 1.8GHz)
More modern manufacturing process (10nm vs 32nm)
Intel Xeon E5 2448L 's Advantages
Larger L3 cache size (20MB vs 18MB)
Lower TDP (70W vs 80W)