If 6.5 feels like the right length in Bauer Supreme, I would definitely go with a 6 in the TF series. You then need to choose between the R width and W. If you are a EE or Fit 3 Supreme, wide makes sense. If you are a D Supreme, then I would stick with R.
Either way, the right size in the TF skates will feel too small before baking. Your toes will be hard on the cap. After baking and break in, you gain about a half size in length. At least that was my experience with the TF9.