The Xiaomi Chiron benchmark results screenshot showcases a 5.6-inch screen with a Full HD resolution at 1980 × 1080 pixels, Snapdragon 835 chip, 6GB of RAM, 256GB of internal storage, 5MP front camera, 12MP rear camera, and Android 7.1.1.
Looking at the key features of the Xiaomi Mi MIX 2 we can see a 5.99-inch 2K resolution screen, Snapdragon 835 chip, 6/8GB of RAM, 64/128/256GB of built-in memory, the same camera sensors mentioned above, and Android 7.1 out of the box.
So it turns out most of the key features match for both devices. The only question concerns the screen size and resolution. I can’t remember there is a Xiaomi branded smartphone coming with a 5.6-inch screen. Moreover, there are a few devices featuring the Snapdragon 835 chip. Among them, we can only mention the Mi MIX 2 and Mi 6. But none of them are packed with a 5.6-inch screen. The only thing coming to my mind is Xiaomi is (has been) working on the lighter version of the Xiaomi Mi MIX 2. And maybe this model is designed for the foreign market.
On the other hand, we can think this is an experimental version of the Mi MIX 2 because the Xiaomi Chiron has been known as the test model of the Xiaomi Mi MIX 2 and most of their features match.