When ex-T abandoned me, I for some reason held onto hope that she'd accept me back even if it was just for closure. I was only with T because I needed someone, but was still waiting for ex-T. I was so resistant to T. Until one day I told her I hated her. She told me that saying that makes it really hard for her to want to work with me. That was like an ah-ha moment. So I started giving her a chance. It also helped (not saying it was positive) that ex-T just wasn't willing to help me in anyway.

My point is that it's okay that you're comparing your T with your ex-T. What's most important is that you recognize that you're doing that. And know that no one will be the same as her. In fact they might be better. It's just my opinion, but giving a T a chance is really good and healthy. But if you just aren't clicking, that's okay.