I have been doing a little research and am even more confused than before.
On the Bake Deco site, this is what they say about Nordic Ware’s Platinum line v their Commercial line:
Nordicware’s Bundt Pans are the perfect size for baking poundcakes, breads, or frozen desserts. The bundt pan’s cast aluminum ensures superior cooking performance and even baking, and the nonstick coating means effortless removal of baked goods and easy cleanup. As you can see below, we carry two lines of Nordic-Ware bundt pans. The Platinum bundt pan has a heavy duty non-stick coating and will do fine for most people. But if you’re a professional in the foodservice industry, or even just a heavy at-home baker then we recommend the commercial bundt pan, which features a commercial, heavy duty non-stick coating.