I believe 5 of the 8 TFly 763's are having the new cabins. Of those 5, 4 will have a premium cabin and the other will be all economy, as some of our longhaul does not offer premium. This could change though. I suppose it will depend on bookings in the next few months. Its already been mentioned that the premium cabin could double in size to take up the whole front cabin.
The remaining 3 will be left for shorthaul use, but have already had a bit of a smarten up recently and had leather seat covers installed.