As indicated by a number of leaks, the iQOO Neo's late-2019 refresh has launched. The new version is much the same as the old, except for its updated chipset. In addition, this phone has 33 watt (W) fast charging, whereas that of thee 'old' Neo was set at 22.5W.
https://www.notebookcheck.net/Vivo-makes-the-Snapdragon-855-version-of-the-iQOO-Neo-official.440383.0.html