Do not forget "distinguishing characteristics" when comparing 3 styles. This is worth 2 of 10 points - history, fermentation technique, ingredients, serving method, etc.
I did what I thought were thorough grids with aroma/appearance/flavor/mouthfeel/commercial example/similarities/differences but for some reason when I made my grids at the start of the exam I forgot the line for distinguishing characteristics on two of the three "compare 3 styles" questions. Gave away 4 points...
hopefully you won't get the water question.