Hi there-
Yes they are very similar- both are VLCD meal replacements-
Cambridge have slightly more flavour choices but both taste ok- and of course flavour it all personal choice.
I did Cambridge before and I have just bought some Exante - Exante is easier to buy as they post it too your home. Cambridge you go and collect and my advisor weighed me and we had a chat about what was working for me.
Good luck with whatever you decide