Both x86 (32-bit) and x64 (64-bit) versions exist, with some creators focusing on 32-bit for older hardware.
These builds are often customized to look more like Windows 7, bringing back a traditional Start Menu, and pre-installing various software (bloatware). windows-9-ultimate-iso-32-bit-full-download-onhax
Usually based on pre-release builds from 2014-2015, often labeled as "Windows 9 Pro" or "Ultimate". Both x86 (32-bit) and x64 (64-bit) versions exist,