Intel Xeon E5 2403 's Advantages
Larger L3 cache size (10MB vs 8MB)
Intel Xeon E3 1231 v3 's Advantages
Released 2 years late
Higher specification of memory (DDR3-1600 vs DDR3)
Higher base frequency (3.4GHz vs 1.8GHz)
More modern manufacturing process (22nm vs 32nm)