I was wondering if the following two sentences the same. I'm seeing both `をほしい` and `がほしい` on my `Anki deck` and I was just wondering if they were interchangeable or if I just made a mistake when I was adding them in.

トムさんはともだち**を**ほしがっています。

トムさんはともだち**が**ほしがっています。