the pedal felt exactly the same, it was not harder to push. but the friction point where its starts to grab changed, mine used to be right at the top if i rested my foot on the clutch it would slip. this one is nearly half way down in pedal travel and has free play up top. while they would look the same the diff between a standard duty (SD) and heavy duty (HD) is the stronger pressure plate.
a HD pressure plate provides more clamping force on the clutch plate but not so much that it becomes harder to push through our hydraulic clutch systems. you get the hard pedal feel when you go into the ceramic puck, brass button, multi plate competition type stuff. i think they are a little over board for our humble 4AGE's
An Exedy clutch can be identified by the SD or HD after the model no.
mine is a TYK-6319HD toyota 200mm sports clutch kit