To keep things consistent with my testing:
- Go into training mode, training room, with Galvan
- Grab ledge, wait until actionable and save state
- Enter frame by frame, drop ledge with grab on the first frame, and press away from ledge on the second frame. Result: Scar jump.
- reset to saved state
- In frame by frame drop ledge with c-stick down or away on the first frame, and press away from ledge on the second frame. Result: Nothing (slight drift away from ledge).