Every number is Russ’s own rating out of 10. Russ has previously stated that he never scores in sponsored videos, so the food he reviews carries no applied pressure or bias.
9/10, would have been a 10 during the caramel hype
A 110 g foil-wrapped Kinder chocolate Santa in Milky Caramel. Russ says it smells great and has that nostalgic Kinder taste with caramel on the outside, a 'perfect child' of the two. He scores it 9/10 and says it would have been a 10 if the caramel hype were still going.