At some point these two varaibles were pretty different (one was strictly set by imposition). However, these two variables have converged to the point where it would probably make sense to merge them. I have not looked closely lately but I would imagine that they are largely interchangeable at this point in time.
When creating routing rules for a multiple size workflow, I am wondering if, when creating the job property, there is a difference between selecting Trim Size or Trim Box Size. Any advantages or disadvantages to either?