Phoned Triumph and was told, if the seat fitted has a small red printed 'Triumph' logo tag then I have the gel seat. The stock seat does not have this. Also the part code only relates to the frame of the seat so both seats would show same number. Aparently, the seat eventually beds in and the 25mm decrease will happen over time and the seat will become more comfortable. Guess I just got to wait and see
Thanks for the welcome!
Alan