On kali you will barely get wet depending on where you are positioned when you go through the water spray blaster... if you are right on top of it you will get soaked
I got absolutely soaked on Kali River Rapids. So much that it ruined my day and i went back to the resort. Splash mountain is usually only drops of water and you dont end up with wet butt syndrome.
From personal experience here, you get soaked in the first row of Splash!!! My mom and I went, and that's where they put us, and just as the log ahead of us went down the big hill, we got the aftermath of the splash!! NOT FUN!!! Needless to say, we both ended up with nasty colds a couple days later (this was in November), and that was just part of the reason for the colds.