There is one minor difference between the two flavours. The amount of protein per serve/per 100g differs between the two products because Chocolate includes real cocoa powder. The addition of cocoa takes up some additional space in the pack and the protein content is slightly reduced. Chocolate provides 26.2g of protein per serve (or 87.3g/100g) and Vanilla provides 28g of protein per serve (or 93.3g/100g).