On the Carloop, D0 is connected to CANa_Enable. D1 is connected to CANa_TX. D2 is connected to CANa_RX.
If you connect up the CAN-hitch in exactly the same way, then there will be no difference between the CAN-hitch and the Carloop, at least for the CANbus capability anyway. The app does not know the difference between the two, so as long as it is connected the same, the app will function the same way; meaning it will function just fine.