RKC Swing vs GS Swings: What are the benefits?

I’ve done hard-style swings up to now. And I’ve been looking into testing out the GS (girevoy sport) style. The form is completely different. The RKC style looks more sharp and tight. While the GS style is more smooth and effortless (almost).

I don’t want to know which is best, because that answer is dependent on goals. I just want to know what the benefits are of each style. For example, I’ve read that the GS style allows for more reps to be done because you fatigue more slowly. Does this translate to any real benefit or is this only important for competition performance (where more is better).

Any insight on the benefits of this techniques is much appreciated!

- Leo