I have constructed a continuous variable by using two different methods. Now I want to know the variable created under which way is the best and should be included in the model. Some preliminary results show that the variables constructed using both methods can significantly predict the outcome (p=0.03 vs. p=0.04). The incremental R-squared added by the variable constructed by both ways is the same. The AIC results for the model with the variable created using method one is 8000.2 and 8000.9 for the model with the variable constructed using method two.
Is there any other method I can use to compare which variable is relatively better?