Synapse 3 Spatial audio settings question

In the audio tab -> Mixer -> spatial audio modes there are several modes to select e.g. game, movie music. I have a few questions about them.

1. The test sound sources (green dots) are placed all in the same spots regardless of the mode.



2. After creating a custom mode the dots can be moved only along the outside edge of the calibration circle. Is there an ability to set the dot's distance to center?



3. What is the difference of the available modes (since it's not the sound sources positioning)? I can't hear any ;)

Thank you for your support.