"What color in Delaney is similar to caramel kiss? Or to 24BT18S8?"
There are actually two colors in Delaney by Envy that are going to be close to 24BT18S8 (Shaded Mocha) called Almond Breeze and Mocha Frost.
Heather's color spotlight video for Almond Breeze.
Heather's color spotlight video for Mocha Frost.
Mocha is going to be slightly more golden, but Almond Breeze has more ash tones so it is going to be lighter than Shaded Mocha. I would have to say Mocha Frost would be your best bet for a Delaney color similar to Shaded Mocha.
Regarding Caramel Kiss, the color that is going to be the most similar in Delaney is going to be Amaretto Cream, but it is a somewhat darker color than Caramel Kiss.
Heather's color spotlight video for Amaretto Cream.
I hope this has been helpful for you.