To address your question: A turret press will perform one die operation for every stroke of the handle, like a single stage press. The advantage of the turret is that you can install all of the dies and the powder dispenser you are using for a particular caliber in one setup. You can actually put a fired case into the shell holder, perfrom all of the operations required to reload it, and remove it from the press as a finished reload.
I personally have never considered that capability to be a huge advantage, and I like the ruggedness of the single stage (Rockchucker) design much better for my use. To me, the progressives are the next step up from a single stage.