Intel Xeon E5 2640 v3 's Advantages
Released 2 years and 6 months late
Higher specification of memory (DDR4-1866 vs DDR3)
Higher base frequency (2.6GHz vs 1.8GHz)
More modern manufacturing process (22nm vs 32nm)
Intel Xeon E5 2648L 's Advantages
Lower TDP (70W vs 90W)