Carrie and Kelly both won two Grammys. And Carrie's song "Jesus Take the Wheel" won a third Grammy, but I think that went to the song's writers.
Simon said (after Carrie sang Heart's "Never" in season 4) that Carrie would not only win, but she would outsell any of the other "idols."
He's going to be right. Kelly has had a 4 year head start on Carrie. By her next album, Carrie will be in the lead.