It's closer than Ben is making it out to be. Bear in mind that this is based on night rides;
The front seat rides are around the same awesomeness on both the creds, but the back car rides on Taron are totally different.
It does have a sense of Skyrush's intensity, not in the ejector hill sense, Skyrush still reigns supreme there, but the direction changes and positive force in the turns are where they are similar.
The floater hill at the end is full floater over it, then dives into the helix at speed to pound with force again before the brakes.
The left side of the train is better, not only do you get twatted by the waterfall but the forces are miles better and there's sideways airtime before the S curves before the 2nd launch. The right seat doesn't provide that airtime.
Helix as an overall package is fantastic, and I preferred it after the first couple of runs on Taron (back during the day, front at night), but Taron is better at night in the back. Helix just doesn't have the constant forces, which is what I prefer.
Until you ride it at night you haven't experienced it fully, day rides are good, the last ride at 9pm is another experience altogether.