Intel Xeon E5 2403 's Advantages
Larger L3 cache size (10MB vs 8MB)
Intel Xeon E3 1585 v5 's Advantages
Released 4 years late
Higher specification of memory (DDR3 vs DDR3)
Higher base frequency (3.5GHz vs 1.8GHz)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (65W vs 80W)