That's the first I've heard of a Lady and the Tramp HDTV version. I agree. the BD is just wrong.
Nice screenshots, titanic.
As far as grain on CAPS films, the point is the presence of grain or not doesn't indicate any loss of quality from the source. However, the absence of grain in earlier films usually includes a loss of some detail and depth.
If you want grain on your CAPS BD's, it's simple enough to re-encode them adding grain to the image. It would be just as accurate.