Whereas the original flavour of Emerge Impact can be classed as an original drink in its own right when compared to its Emerge Dual predecessor, this sugar free version does not deserve the same crown. Yes, it is sugar-free, but it contains 3 calories/100ml (yes, a respectable effort) whereas the full fat version contains 9 calories/100ml. Unless you are actively avoiding sugar specifically, there’s very little reason to get the sugar-free variety. Taste-wise it’s slightly less flavourful, perhaps even tasting slightly watered down compared to the original version. Regular readers of this site will know that usually I prefer the sugar-free versions of drinks, however in this instance the combination of less sugar plus sweeteners in the original version have made it the better choice if you’re after flavour.