I feel like this is a vast overgeneralization, but Ts are people too, and nobody likes feeling they are second best!! I think it is kind of possible that if you tell a therapist you are seeing another therapist, they will get angry. It depends on the T's personality but that's just human, right. Re: who to pick, nobody can tell you the right one to choose, neither the old T, nor the new T has the answer to that, you should listen to your gut. And I agree with Anne that talking about the switch could be useful--- but it might be more useful to have that conversation with the T you want to keep going to instead of the one you stop seeing.