In practice, this proved true then. Our preferred the mouse Bobbycar from Uncle - simply because it is progressing so better. It rolls easily and it makes the toy more fun. From the other model, they go down again and again, when she realizes that it is not going well.
Keep we both ultimately Bobbycar versions. Currently they sprayed on the 'sounds', later we go to the other model and reserve the Flüsterauto for the apartment. Incidentally, this is really silent, but the little girl does not currently much hullabaloo.