Pumpkin puree, usually marked Pure Pumpkin, is 100% pumpkin without any other ingredients.   Pumpkin pie mix or filling is pumpkin that is pre-sweetened and has spices added. It doesn’t usually contain any dairy or eggs, but depending on how the added sugar is processed may determine whether or not it’s actually vegan.  While I don’t recommend it, if you decide to use it when making this pumpkin pie recipe, eliminate the sugar and spices added to the filling, but you will still need to add the tofu, coconut cream and tapioca flour.