When comparing aurman vs Yaourt, the Slant community recommends Yaourt for most people. In the question“What are the best AUR helpers for Arch-based Linux distributions?” Yaourt is ranked 5th while aurman is ranked 9th. The most important reason people chose Yaourt is:
Yaourt commands and flags match pacman, so it is immediately obvious how to use it.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Native pacman compliant
Pro Secure
According to Archwiki: "does not source the PKGBUILD at all by default; or, alerts the user and offers the opportunity to inspect the PKGBUILD manually before it is sourced. Some helpers are known to source PKGBUILDs before the user can inspect them, allowing malicious code to be executed. Optional means that there is a command line flag or configuration option to prevent the automatic sourcing before viewing."
Pro Equivalent to pacman
Yaourt commands and flags match pacman, so it is immediately obvious how to use it.
Pro Colored output
Pro Adds seamless access to the AUR
Pro Can be set up upgrade your system with no additional prompts
Pro You can adapt PKGBUILD to your needs during the (pre-)installation process
Pro Supports backups
Cons
Con Tends to break easily
Due to a lot of Python dependencies, aurman tends to break after Python/libraries updates. Most of the time, the fix is as simple as reinstalling aurman.
Con Insecure
More information here.
Con Not maintained anymore
According to the Wiki page of Archlinux, Yaourt development is stalled.
Con Does not perform clean builds
Environment variables may get carried over while building a package, preventing successful building.