Grandparents

I've been pretty absent this last week since my parents were visiting. It always seems to open a giant can of chaos when they are here. I have a question though, does anyone else deal with grandparents who favor one child over the other? My parents direct the majority of their attention to Ethan, whereas Landon becomes the third wheel. They constantly compare to the 2. Comments such as "Ethan didn't act like that" or "Ethan was such a good boy" are virtually continuous. How do you deal with it? Do you over compensate with the "outcast" when the grandparents are around?