The brewing process seeks to convert sugar to alcohol, so there shouldn't be very much sugar left in any alcoholic drink. A pint of Fosters contains 3g.
The whole point of drinks like Lucozade is that they're packed with sugar. A 380ml bottle contains 33.1g of actual sugar but a further 65.4g of glucose-based content (which is 'sugar' in all but name).
So there's about 33 times as much sugar (including other glucose-based content) in a bottle of Lucozade as in a pint of Fosters.
Lucozade's what our health centre uses for glucose tolerance testing.
Alcohol, or at least the consumption of, is regarded as the urine of Satan and is to be confessed to before Doctor Doom, the bringer of misery.
You very carefully specified sugar, to which the answer for a fermented product is "low in sugar". I only post the above to get across that they are in no way calorie-free (where do you think a beer gut comes from?) and comparisons are not straightforward.