I've been sitting on my spare transmission with MFACTORY diff installed. I'm still really torn on clutch options for this car. It really is difficult compared to my past platforms to choose. Unless you don't mind downtime with your car, and/or do the work yourself I think I would avoid stock clutch. My stock clutch at 100k+ is holding 300wtq admirably, but this is mostly daily driving application with minimal abuse. If you drive hard, drag race, hpde, increase traction by putting Rcomp, 200TW wide meats, or any combination it dramatically stresses the clutch. I'm excited that Whoosh has their option. I'm leaning towards that and a new dual mass flywheel. Although whoosh labels their clutch a stage 3, I bet it has excellent driveability. The friction material looks mild like a kevlar/organic blend. Increasing surface area is a great way to increase tq holding with less draw backs. The only disappointing part in my eyes is spending 700+ dollars for the dual mass. Dual mass is great for drivability, NVH, and preserving gearbox/driveline but that is just so much money. I can get/got kickass twin disc/flywheel setups for my CTS-V and old Galant VR4 for the same money.
I'm not a fan of RTS Twin friction setup because it is also exceedingly expensive, and in my experience clutch discs that don't have a more aggresive shield to encapsulate the clutch springs tend to launch out. I'm not a fan of the RTS Organic setup because it doesn't have a dual mass flywheel or clutch springs to address NVH and driveline stress.
The ST200 clutch was what I was leaning towards, but IMO Whoosh Motorsports clutch instantly makes this a bad value. The Comp stage 2 clutch looks decent, has a 2100lb pressure plate I'm assuming, but the friction media looks similar to Whoosh Clutch. I'm curious how heavy the pressure plate is on the Whoosh Clutch.
I despise Fidanza as a company. About 15 years ago a few friends of mine, and me bought clutch and flywheels from them. All of us had issues with clutch springs either rattling horribly or in two of the cars they literally had the spring come out and destroy the flywheel. We spent weeks with customer service with them telling us we didn't have the appropriate model for the use cases. Being younger and having less discretionary income I had to stay persistent. Eventually they wanted to have the product shipped back for analysis. It turns out they had multiple issues, a couple of them engineering design failures, and one of them was supplier/material issue. They agreed their were issues, but would only offer a slightly reduced price on new parts. Mind you.... they were trying to send the same faulty hardware that had already failed four of us. I have followed the company for awhile, they have definitely changed their designs through revisions since then, but they won't get a dollar out of me.
If I was going to a single mass flywheel I'd try to source a chromoly flywheel. They aren't as light or as exciting, but in my experience more reliable. The replaceable friction faces of the aluminum flywheels seem to warp and go bad quicker (40K miles). Mind you it was in a HDPE/Autocross car, so motorsport use. Everything is a compromise so you need to pick what is most important to you.