Intel Xeon E3 1220L v2 's Advantages
Lower TDP (17W vs 140W)
Intel Xeon E5 1603 v3 's Advantages
Released 2 years and 4 months late
Higher specification of memory (1866 vs 3)
Higher base frequency (2.8GHz vs 2.3GHz)
Larger L3 cache size (10MB vs 8MB)