The Samsung is obviously steadier - but the quality (color, contrast etc) looks inferior.
Neither can compare to the gimbal like quality of the GoPro using hyper smooth.
But over stabilation makes videos look fake. Everything is artificially smooth like the camera was traveling on rails.
In the examples above, when walking on the pier, I preferred the iPhone's slight sway when walking. It was still smooth enough but gave the impression of walking. The Samsung on super smooth looked like the camera was on a track. Not very nice.