I would love to know exactly what apples go into these packs. All you can say for sure is that they include the misshapen, undersized, slightly damaged and overripe ones that never hit the fresh fruit shelves, plus perfect ones surplus to the quota on the supply contract from last year and converted to UHT juice, concentrate, etc. Probably all dessert apples, the Bramleys probably all going to Mr Kipling! Hence the need to add 'sharpness', in the form of malic acid and tannin to make reasonable cider. The 'cloudy' ones may be better, but this may just be a marketing ploy. If you add ascorbic acid (vitamin c) the juice stays cloudy, and looks 'organic' and 'wholesome'.
Avoid juice 'drink' as this is watered down and contains additives. Anything 'not from concentrate' is a preferred option and often costs little more. If you have an electric juicer, throwing in some freshly made juice won't go amiss either.