Some of my preferences (e.g., more people living and fewer dying) are about the external world. Some (e.g., having enjoyable eating-experiences) are about my internal state. Some are a mixture of both. You can’t just swap one for the other.
A way you might distinguish these experimentally: If you are correct about your preferences, you will sometimes want to get new desires. If for example you didn’t currently enjoy any kind of food, but prefer having enjoyable eating experiences, you will try to start enjoying some. The desire-agent wouldn’t.
A way you might distinguish these experimentally: If you are correct about your preferences, you will sometimes want to get new desires. If for example you didn’t currently enjoy any kind of food, but prefer having enjoyable eating experiences, you will try to start enjoying some. The desire-agent wouldn’t.