Whp is not what breaks gearboxes. Its sticky tires/grip, digs and torque.....
The s15 gears are physically smaller to allow the gearstack to fit in the exact same space of the larger gearstack of the 5 speed.
Dont doubt ya king.. but a single notional data point doesnt properly categorize the actual physically smaller size of the gearstack or the well documented failures
Also intended use and vehicle weight has a major affect on how long they last.....that and which Japanese glass company made the gearstack that day hahahahah
