Only the colour is different

Yes, the band is easy to detach in seconds and there are a wide range of alternatives, though I don't know how many are available directly in Europe. Of course, they can be ordered from China.

You cannot make direct calls with this watch. However, it does support smart notifications, which allow you to receive notifications from your phone. You must use your smartphone to make calls.

I had seen this in a test report, but now I have to correct my answer, because the smartwatch comes without NFC. Please excuse me!

Correction: The Xiaomi Smart Band 9 Pro does not have NFC. Sorry for the wrong information. Yes, the Xiaomi Smart Band 9 Pro has NFC (Near Field Communication). This function allows you to make contactless payments and connect other NFC-enabled devices.