I’ve been using Fedora for over a year with KDE. Before that it was Kubuntu for a year. The difference is night and day in my opinion. I believe this is due to the constant updates on fedora that fixed many annoying bugs I had with the ubuntu install. The downside is that you are likely to get a kernel update about once a week, it honestly hasn’t been an issue and i’m a college student who needs essentially 100% uptime on my boxes. But in my opinion it’s the perfect trade off since it’s not quite rolling but still on the cutting edge for the most part.