In all cases the balance location determines pitch (speed) stability. And that is all it does. The other determinimg factor in its location is the amount of angular difference between the the wing and tailplane. Gliders and trainers tend to have their 'trimmed speed' built in by having some positive difference between the two, that is the wing is at a couple or so degrees more than the tail. The dive test is then used to achieve the the most rearward balance that is still pitch stable at that trim. This setup can be used with scale models, and warbirds, just to make them easier to fly, in that they too can be set up to have a natural 'cruise' speed and will then respond to changing speeds in a predictable way. Aerobatic models, for want of a term to group them all in, tend to have no angular difference between the flying surfaces, so now the speed range, without the model changing pitch attitude, is designed to be much wider. Modellers like them to display the same control responses either way up, so although the dive test works for models that spend most of their life upright, it needs to be modified for those that don't care which way up they are. So the methods for determining the balance is different. However, the overall position of the 'best' balance is individual, you, the pilot, will decide which is the 'nicest' place to fly it.
Evan, WB #12.