I just buy the normal light one, i am normally really fussy about the amount of sugar and sodium in foods for the girls.. the sodium is higher in a cruskit but is very low in sugar.
Z is lucky to have 1 cruskit a day or every 2nd/3rd day so i am not overly fussed.. she can't eat much else at the moment so gotta keep her happy.

IE.
Milk Arrowroot 24.3g serve: Sugar:5.4g Sodium: 66mg
Cruskit 11.4g serve: Sugar: 0.4g Sodium: 101mg