This ends up being a "depends what you like" answer. I love slackware. Others love redhat. They can do the same things. Slackware lovers like how things are simple in slackware (as an architecture with less layers of automated stuff). Redhat lovers like how a lot of the time things "just work" but they don't know how or why they work. You can probably get redhat up and running easier, but with slack you can understand how the system works easier.
-- Doug