Well the point is to check how changing courage, and other parameters (except accuracy) influences the performance of AI pilots.
The AI profile is custom, but the AI class on one side (Captain) is unchanged compared to FS 2, which I call "stock". It challenges an edited Light Fighter Captain AI class, which I call the "custom" class.
These could be directly tested against each other, as the profile is the same for both and doesn't give any side any advantages or disadvantages.
I could kick out the ai_profiles.tbl and use only the characteristics found in ai.tbl, but I have a feeling the original profile will fade away pretty soon and only custom ones will be in use.