I totally believe the same thing. I was watching an interview in the early eighties, and her Turner's voice, speech inflections and even facial expressions seemed to be modeled after Baxters'.
That said, I think both were/are/were over the top with their histrionics.

I don't see the physical resemblance but their voices are very similar!

I can see the resemblance.

I agree with you. In Eve, in the scene where Addison brings down her house of cards, I finally thought to myself, Kathleen Turner! Her looks, her voice, everything. I saw the post about Mira Sorvino, and figured no one would have seen the Kathleen resemblence. BTW, I think that Kathleen Turner was one of the sexiest, take charge, actresses ever and it looks like Baxter was the same way.
Man in Stadium Crowd: Hey Look! It's Enrico Pallazzo!

Yes!! Watching the movie I was thinking it was Turner, but then I did the math

Funny, I always say Anne looks like Kathleen, but everybody always disagrees with me. But it is clear: the eyes, the voice, the hands Kathleen was clearly inspired by Anne.