In this wide world of Linux, there are primarily just two package management systems which reign: RPM and Deb. Most binary distributions use one or the other and there has long been tension between the two. So which system performs better? More here
There’s no doubt that for staunch supporters of either camp it will continue to be a fiercely contested issue. Either way, when you look at the numbers Yum is completely trounced by Debian’s aging package management system. Fedora 11 might have introduced a few new improvements to RPM, but perhaps it needs a complete overhaul if it’s to ever compete.