Intel Xeon E5 2648L 's Advantages
Lower TDP (70W vs 105W)
Intel Xeon E5 4640 v3 's Advantages
Released 3 years and 3 months late
Higher specification of memory (DDR4-1866 vs DDR3)
Higher base frequency (1.9GHz vs 1.8GHz)
Larger L3 cache size (30MB vs 20MB)
More modern manufacturing process (22nm vs 32nm)