It will come down to what makes the complaining celebrity's voice iconic, which for Scarjo is the 'gravelly' bit. Which smooth Sky had none of.
[1] actress reading poem: https://www.youtube.com/watch?v=eWEEAjRFJKc
Ok? What materials would you suspect discovery can uncover from Scarlett or her team?
> was recast to someone more SoCal in post-production
Was recast to Scarlett Johansson. Hardly a good argument if you want to argue that her voice is not unique.
Are you arguing that Her performance is not the resembling factor here but simply the natural voice of ScarJo at rest, disregarding Her?