Depends. Usually f/t is somewhat less, but that is not universal. If your best buddy breeds rodents.....

I've got 5 snakes. 4 took f/t instantly. One little stubborn one won't touch it. I'm still working on her and she's starting to show interest but not striking. Some of them take a long time to switch over and a few won't.

You might think about offering live for a few feedings while your snake settles in and then try switching to f/t.