There's two different things: the Sky voice they launched last year, as heard here: https://www.youtube.com/watch?v=RcgV2u9Kxh0. The voice actor is the same, but the intonation is fairly flat.
They changed the voice to intone like Scarlett Johansson's character. It's like they changed the song the voice was singing to one that lots of people recognise.
That's a big stretch. Allowing intonation to be copyrighted would be incredibly silly. The timeline and intention makes sense but this being "similar" would never win and it shouldn't. Sam should have kept his mouth shut.
