Intel Xeon E3 1220L v2 's Advantages
Higher base frequency (2.3GHz vs 1.8GHz)
Lower TDP (17W vs 75W)
Intel Xeon E5 2648L v3 's Advantages
Released 2 years and 4 months late
Higher specification of memory (2133 vs 3)
Larger L3 cache size (30MB vs 8MB)