If I read your post correctly, your new saw kerf does not match those of your other Festool saws? If so, and if that is important to you, then you would need to adjust them all to match. When I was considering the TSV I contacted on eo the Festool trainers with the question about getting all the kerfs to match and I was told at the time that although it would be possible, they would suggest having a separate rail set for the TSV.
I never bought the TSV so I didn't go further.
Peter