Differences between Bi-Lateral and True Position

Differences between Bi-Lateral and True Position

I am asking this question because I know I will be asked this question. 

Between the True Position and Bilateral True Position windows there are some differences. 2 major differences are the lack of "Create New Reference Frame" option and the lack of Coordinate reporting. Until now I have run bilateral true position reports for slots and true position reports for holes intuitively. I have not considered using a new reference frame for slots and stopped using the coordinate reporting option for holes as it was redundant for the reports I was creating.

Why are  "Create New Reference Frame" and Coordinate reporting omitted from the Bilateral report?