: The "patched" version often includes specific fixes to prevent "USB bulk read fails" or timeout errors that occurred in the original version when flashing larger image files.
Background
Open xFSTK and set the GP Flag (usually 0x80000807 for Zenfone 2). xfstk downloader patched
rules to allow the xFSTK downloader to talk to your hardware. : The "patched" version often includes specific fixes