M&S Sweet Potato chips vs Sainsbury's Sweet Potato Fries vs Waitrose Crispy Sweet Potato Slices

Recently, I tried M&S Sweet Potato chips, Sainsbury's Sweet Potato Fries and Waitrose's Crispy Sweet Potato Slices so I thought I would compare them.
The only one that cannot be compared like to like are the Waitrose Crispy sweet potato slices because of the shape but in terms of texture, they were dry.
As for Sainsbury's sweet potato fries, they visually looked good but they were hard and crunchy like carrots.
So the winner is Marks and Spencers Sweet Potato chips which were moist and soft and they tasted like they were roasted from fresh.