Hi Frankpiet,
I have had both the model 10 and now own the concerto. {See my system pics.} I think on raw performance the two are very similar. The Concerto gives you so much more flexibility. It has 4 inputs, volume control, phono if you want it, and also runs very cool while using very little energy. The model 10's are great amps, but run warmer{ if this matters}. Also 2 powercords/ dedicated lines would be required for the 201's. If i was looking for an integrated, i'd buy the Concerto. If i was looking for an amp, i'd happily buy the model 10.