I went to AFT and cannot fault them. In my experience I found Exeter is good to train at as there is low commercial traffic so you don't hang around on the ground or in the air, but busy enough to make you think. As others have said the Duchess is a great stable platform to learn on. The weather at Exeter is generally better than Bristol which will help for the CPL. The instructors are all vastly experienced and they now have a new sim. They are flexible and didn't take my money until the end of the course, and the school has a flying club (rather than school/institue) feel about it so you feel valued and enjoy your time there.
That's what I found, but the most important thing, I think, is pay them each a visit and see which one you feel most at home with.