As Bren says, I did indeed remember and got one of each to try.
As I was out all day today I had the peanut one in the car and it wasn't actually too bad at all. It was certainly nice to actually eat something and although the texture was very dry and heavy, drinking plenty of water with it conteracted that issue. I thought it tasted very much of peanuts, just not in the least bit sweet (which is fine by me!). Maybe because I've waited until week 5 to try these my tastebuds have had time to adjust to the unusual flavour of LT and that's why I did quite like it.
I'm out again tomorrow so will take the coconut one to try then but all being well I may have found a solution to my problem regarding how to manage shakes for lunch at work dilema!