It's definitely a steeper drop at SW than Splash Mountain and you get VERY wet!
The theming is kind of odd....it's great in the beginning and then I think their creative people took a nap. Still a fun ride. Did I mention you will get WET????
I also think Splash Mountain is worse. I only did this once and would never do it again. Journey to Atlantis I can tolerate and have done it a few times as I love the watercoaster part at the end.