The Asus ZenFone 5 and ZenFone 5Z have been unveiled at MWC 2018 in Barcelona tonight, just as expected. Although both feature a dual camera setup with a flagship Sony IMX363 sensor with 1.4 µm pixels and a 6.2-inch display, the ZenFone 5 has a Qualcomm Snapdragon 636 processor inside, while the ZenFone 5Z is powered by the top-of-the-line Qualcomm Snapdragon 845 SoC.
https://www.notebookcheck.net/Asus-ZenFone-5-and-ZenFone-5Z-now-official-with-dual-cameras-in-tow.286742.0.html