Recent rumors have hinted that Qualcomm will release a 'lite' version of the Snapdragon 875 flagship SoC on its launch. Now, a new leak asserts that this "870" has in fact been secured by OPPO for use in its upcoming devices only. It is said to be faster than the 865, although the two processors may have similar architecture.
https://www.notebookcheck.net/The-Snapdragon-870-may-be-exclusive-to-OPPO-phones-on-its-launch.500954.0.html