Measurements are the same, but the textural quality of the finished product will be very different.
You can make your own DIY cake/pastry flour for pastry by mixing AP or bread flour with corn starch.
To make a cup of DIY cake/pastry, put 2 tbs corn starch into the bottom of each cup measure, and fill the remainder (7oz) with (your Buccaneer) AP or "better for bread" flour. Don't forget to mix the corn starch in before using the softened flour.
Softened flour) is very good for "Southern" biscuits, and other "self rising flour" projects too. Add some double acting baking powder (about 1-1/4 tsp per cup) and, if you've got your starch/flour just right, it's better than Bisquick; a good substitute for the elusive White Lily flour.