I don’t recall the ending of the original. (I liked both movies). But I do recall being very gripped by the ending of the remake in Rooster’s attempt to save the girl. Running his horse to death like a madman, then running himself like a madman. It was a good juxtaposition (sp?) of him being mean and ornery and his compassion for this young girl.
And I liked the new girl as well, and IIRC she had an interesting story on her getting the part - but I forget what it is now.
The climax is the same in both movies. In the original, Rooster takes her all the way back to Fort Smith - as it is in the book (although she doesn’t lose her arm). I believe, in the remake, she’s taken to a farm house on the way to Fort Smith. Small difference.