Hello jocanguro,
Some had bought the "new" K1600 in 2017 due to various innovations. In direct comparison, we noticed that the performance is lower - you can live with that. During the trip to the Swiss mountains, we noticed that the new K1600 got hotter much faster than the old K1600 by 2016.
https://youtu.be/DNbnguIM7kk from 8:15
The whole thing motivated the hard core to exchange the K1600 for a boxer. At the end of June in the Dolomites we will only drive 50% K1600 - the rest have GS, GSA, RT, and RS.