Are the two the same? I have no clue. A brief google search didn't provide much help.  Update:  Here's an example of baking flour 
The important phrase in the description of the flour you linked to is "all purpose". It's all-purpose flour, the middle of the road flour that's reasonably good for anything. They chose to throw in the word "baking" to emphasize that you can bake with it, presumably because it's a gluten-free version which is designed to work for baking.  It has absolutely nothing to do with baking powder, a chemical leavener. Besides the fact that it says "all purpose flour" in the name, you can also tell from the fact that it comes in a six-pound bag, and the fact that the ingredients are all non-wheat flours. 