Maybe its my era, but Gable as a competitor impacted our sport dramatically, even internationally. He was such a great coach, too. Even had success as a coach internationally, not only with his Hawkeyes, but as Team USA coach.
Cael as a domestic collegiate competitor is the GOAT. Internationally he didn't have the global impact that Gable had, despite similar resumes. As a coach, he is getting right up there with Gable, so I would have to say his impact is more as a coach than competitor, especially at an international level.