When comparing Yaourt vs paru, 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 paru is ranked 6th. 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 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
Pro Based on the design of yay
You can simply alias yay=paru if you switch from yay.
Pro Fast
Paru is faster than yay.
Pro Actively maintained
With the main yay developer stepping away from yay, paru is more actively maintained than yay.
Pro Saner defaults than yay
Cons
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.