This is hard to answer because bakeries aren't all using the same product. It's very specialized. The stuff they use for bread or pizza dough is typically diastatic (enzymes help the dough and with browning), but nondiastatic is often just used as sweetener, and that's more like what we use.
If you have time to kill, peruse the Briess website for more than you want to know about it. They don't just have one product for all of us, bakers and brewers alike. Now, whether you can never substitute, I can't say.