The only parallel between the KIA and the Exchange variation is that both seek to avoid the French main lines. Other than that, they are very different. The Exchange seems to lead to quiet and balanced positions where draw is the most likely outcome, while the KIA tends to lead to sharp and unbalanced positions with winning chances to both sides.
I am not sure why some French players seem to feel that the opponent has some kind of obligation to enter their pet lines.
Right! That is precisely what I meant to say: the thing the KIA and exchange have in common is to avoid the "real" French. In all other respects they are indeed very different.
I think the original motive for this thread was how to respond to the French as white; I think the OP should now have quite a good idea of what the possibilities are - either avoiding the French altogether - or take it up.
The only parallel between the KIA and the Exchange variation is that both seek to avoid the French main lines. Other than that, they are very different. The Exchange seems to lead to quiet and balanced positions where draw is the most likely outcome, while the KIA tends to lead to sharp and unbalanced positions with winning chances to both sides.
I am not sure why some French players seem to feel that the opponent has some kind of obligation to enter their pet lines.