Intel Xeon E5 2603 v3 's Advantages
Higher specification of memory (1600 vs 4)
Larger L3 cache size (15MB vs 8MB)
Intel Xeon E3 1280 v5 's Advantages
Released 1 years and 1 months late
Higher base frequency (3.7GHz vs 1.6GHz)
More modern manufacturing process (14nm vs 22nm)
Lower TDP (80W vs 85W)