I put other. My transference towards T1 was such that it became unbearable because he wouldn't acknowledge it or work through it so I faced weekly rejection and a whole load of pain from someone I cared deeply about. It was heartbreaking but I had to leave because I knew I needed to work through those feelings and it was just too painful to be around him with all those feelings and not discuss them.
My transference hasn't transferred to T2 and I've been working with him for a year now. He was there for me throughout the grieving process for T1 and I've uncovered the origins of the transference for T1, which has been very healing.
But, I don't think it's necessary to switch if you have a good T who is willing to hear you and help you work through your feelings. This week I told T2 that I am starting to have stronger feelings towards him, and he just said "that's OK, hold them lightly". which to me meant to simply allow them to be. I feel sure I could work through any transference with him.