@Iain Utah Posted on another thread similar to yours, hats off for her/him noticing the difference, supposedly African/Chinese have a more round head compared to the Toulouse which has more of a Squared-boxed head. Either way once her feathers start developing you should be able to get an idea which breed she is. She is adorable!
Though they could be Brown Chinese - they look very similar as babies - but I think Chinese should have a more upright posture, even as a gosling, almost like a Runner duck would.