Hi Mark,
I've done both CD and LT and I did prefer CD. I like the fact that you have more choice and the flavors are in my opinion a lot nicer. The Choc Mint drink is FANTASTIC and the convenience of having the tetras was the biggest selling point to me. Its ready made and comes with a straw so you can have a drink on the go.
I also liked that as the weight comes off, there are different plans to introduce food slowly.
I loved LT and lost most of my weight on it, but I am a big CD fan too.