Quicksilver vs Launcher vs Alfred

[truth1ness]

I've been using Quicksilver as my launcher app forever. I've been hearing these newer names a lot, particularly Alfred, recently. Can anyone who has tried multiple or switched away from or to Quicksilver (recently) cover any big differences between these three?

 

[Freyqq]

I used quicksilver first. Alfred is just a better/more updated version of the same thing. OSX launcher is better than it's ever been, but Alfred is still better.