To the best of my knowledge DynoJet makes only one model of Power Commander for all the 4 bikes who uses this engine, these being the XTX / XTR / XTZ and of course the MT03 however they don't bother to differentiate between the models and they call the model XT660R only but you can rest assured as you've rightly said that these being built around the same engine that the PC will work on all models.

Just a note, we are all more than happy to answer questions when we do get a chance to get to them each of us at disposable time, usually we are very quick to answer and depending on how busy we are some questions like this one, can be answered a little later, but it's always a matter of short time, trust me there is no need to go... no one? anyone? etc because it's annoying and I find it pushy and impolite. So... no harm done but please remember it next time, cheers