changing model type

hi.
i saw all the models who used to be "N" are now "T".
is there any different?

from Matthia:
ProfiLux 3.1T 3.1T and eX are similar in functionality P3.1N and P3.1N eX.

The model series A and N were standardized and optimized, thus it was possible the T-series to produce something cheaper.
T is an internal name.

So, A and N, there is no more, instead only T