Storm Runner and Xcelerator

I was wondering how Storm Runner and Xcelerator run considereing that they're the same type as TTD and KK. DO they have as much downtime? I guess would make sense on Xelerator since it has a faster launch. It goes from 0-80 in 2 seconds while TTD goes 0-120 in 4. So does anyone know?

This would be better suited for CoasterBuzz.

Im no Engineer, But I would think that greater stress is put on the cable with rides like TTD and KK. They are launched at greater speeds, which I would think wears more on the cable. Also I think they are engineered a little bit differently than Storm runner and Xcellerator.