I really wasn’t expecting “this” list.
Kingda Ka and TTD are pretty much the same coaster. Big deal that KK is 30 feet taller, 8 MPH faster and has a speed hump.
120/128, there’s not much difference and the same goes for the extra 30 feet of height (though the drop is shorter than TTD).
X2 (or X) has its scariest moment with the first drop, a 200 foot 90 degree face plant. The rest of it isn’t so bad and I’d expect the Japanese version at Fuji Q to be about the same.
There’s no reason to go to Japan to ride Takabisha until you’ve taken the trip to Dollywood and ridden their version.
The stuff at the top of the Stratosphere Tower in Vegas is probably the scariest. Both Insanity and X Scream hang you over the edge of the tower, 1000 feet up, followed by the Big Shot blast tower, which has to leave you worried that the car will overshoot the top of the tower and you’ll be falling 1200 feet to your death.
So it’s the Vegas 3 and the two tallest roller coasters in the world that get my vote.