Two different bikes. The sparrow, with the carbon Bontrager wheels, is a Trek. The magic bike is the BMC. Bontrager/Trek is very clear in their owners manual that cork pads are the only recommended pads. Of course they specify Bontrager brand pads. From the manual:

"Use Only Bontrager Carbon Stop Cork Brake PadsBontrager carbon rims require special brake pads to prevent heat fade and to work properly in wet conditions. Heat fade is a loss of braking performance after long, hard brake application. In addition, incorrect pads can create excessive heat on the rim, which can cause delamination of the carbon fiber. Carbon fiber rims also can be extremely abrasive in wet conditions, causing standard brake pads to wear prematurely. Only use Bontrager Carbon Stop Cork Brake Pads with Bontrager carbon fiber rims."

So I just need to find out how true this is, I don't want to damage the wheels. But I'd also like to be able to stop the bike.