7DMT is quite tame compared to the drop on ToT. In general, 7DMT is a very, very mild coaster. No huge drops, no blazing speed. A few banked turns, but nothing significant.
The big drop on Splash is pretty "intense", but if you managed ToT, this will be a breeze. First of all, with Splash, you know precisely when the drop is coming. You can see it coming...and that anticipation is part of the fun. The drop is also at an angle, not straight down, so it's a different sensation. Wind in your face as you accelerate down. Then the splash at the end. The other drops before the big one are of increasing size, but none of them are what I'd call "huge". There is one that is a very mild drop but is in pitch darkness. That part makes me clench my teeth every time.