The Witcher 4's Ciri sounded completely different because, yes, she has a new voice actor that "truly brought Ciri to life"
Ciri sounded much more gruff in our first look, but it's not just because she's aged since we last saw her a decade ago - it's because CD Projekt Red has recast the role entirely. The Witcher 3: The Wild Hunt's rendition of the character was played by Jo Wyatt, though the studio has now confirmed that she won't be returning the for fourquel.