These two machines are very close to each other if you compare them both head to head. The Classic Pro comes with more water reservoir capacity, whereas the Gaggia Brera features an inbuilt grinder.  The Classic Pro is more designed for heavy coffee consumption.  In contrast, the Gaggia Brera is designed to put you in some control of your cup. You can use whole coffee beans, and in this way, you can fine-tune the tastes and fragrances in your come while using Gaggia Brera.