sorry man, don’t have the answer to your questions.
Ok… I have the exedy organic disc in my car along with the exedy pressure plate. I love it… My friend has a Clutchmasters stage one and the pedal on his car take way more force than mine, and mine usually grabs harder then his, and mine has lots of miles on it. I got my car (92 GS-R) with about 169,000 on it and the guy said that the clutch was replace about a year before I bought the car, so it has about 2 years on it now and I have pounded the sh*t out of that clutch and it has never let me down. I would go with the Exedy. Exedy is know for its light pedal pressure and lots o’ grab… I mean lots… I have torn 2 trannys in half and the clutch has survived each time… It keeps on going, and going, and going… you get the point? I would recommend this over any thing… especially at that cost… I might even pick one up just to save the money… Hope this helps