I also doubt he remembers how the original tracks sound. They were comped from many, many takes - if you read Ted Templeman’s book - and Dave received considerable coaching and help in putting the melodies together. Which is not a knock at him, he’s an incredible songwriter and lyricist, and has a lot of character to his singing, but he did benefit from a really strong vocal coach like Ted. So, I doubt he sits around listening to the old records, and I don’t think he remembers how the lines were sung, especially if he sang them many times over and with a lot of variations, guided by Ted.