It compares rather to Gentoo as it is in general compiling its packages from the source. The advantage over Debian and Slackware is that the packages are compiled the way you want them, e.g. with optimizations for your CPU and the optional flags you selected (e.g. --use-qt, --use-X).
Does anyone know if that one supports installation on XFS systems? I used to install Gentoo with that option, but unfortunately Gentoo doesn't support XFS any more.