I believe the AF and KLM 789 aircraft are nearly identical in J ; AF has an "orphan" small fleet of them and eventually switched the rest of their deliveres to KLM.
The AF 772 is the older, but still decent BEST cabine. The appareils are quite old though.
All have a 1-2-1 layout, just the 772 is a little wider and thus, the seating a bit more spacious.