Intel Xeon E3 1226 v3 's Advantages
Higher specification of memory (DDR3-1600 vs DDR3)
Higher base frequency (3.3GHz vs 2.8GHz)
Intel Xeon E3 1505M v5 's Advantages
Released 1 years and 5 months late
More modern manufacturing process (14nm vs 22nm)
Lower TDP (45W vs 84W)