The 2 openings are very different in the way they deal against the advance variation.In French defense the main idea is the early pressure on d4.For example:
Black will later pressure on e5 too with ...f6
In Caro Kan , things are different .Black has the "advantage" of having his light-squared bishop out of the pawn structure but that bishop becomes a target and allows white to gain k-side space with tempo.Of course the early advancement of the pawns is not without consequences as they may in turn prove a target too.For example:
Hello! I have one question!
How to play as black if your opponent play advanced variation in Caro Kann or French?
What's the main idea in this opening?