Basically still the same thing. All of the Sony input adapters are overpriced little boxes with circuit boards and features added, when all you want to do is change the type of connector to get what you want to hear to come out of your head unit. Sheesh. I wouldn't be surprised if that circuit board changes the signal somehow, and that's why the Sony head unit refuses to play the AUX IN, even if you have what seems to be a simple version of an appropriate adapter. I hate Sony.