I'll show examples of the old version of Meet Samantha with illustrations by Nancy Niles, and the new version with illustrations by Dan Andreasen. I like the older versions better because I grew up reading them. I think Cornelia looks much more elegant in the older versions.
I was looking through the Peek Into the Past sections of both books and noticed that the mansion on the first page was a real picture of a house in the 1986 version and an illustration in the 1998 version. It may have to do with privacy for the owner of the house. Isn't it cool that Grandmary's house actually exists?