The industrious folks over at XDA-Developers have dug up info on two upcoming Xiaomi phones code named Comet and Sirius. And they will use a Snapdragon 710 chipset part of Qualcomms AI-focused 700 series that appears to be a rebranded Snapdragon 670.
The two phones are mostly the same. Both have OLED screens with Always On Display, both run Android 8.1 Oreo with MIUI, both are dual-SIM phones with 3,100 mAh battery (or so), an IR blaster but no NFC.
The major difference between them is that the Sirius model is set to have a notch on its screen and its selfie camera will offer portrait mode. Resolutions of any of the screens and cameras are unknown.
As mentioned, both will use the same chipset, which has an octa-core processor with two Kryo cores (based on Cortex-A75) and six more cores (based on A55). The performance seems to between a Snapdragon 660 and the flagship 845.