In my opinion powerstop is an excellent marketing company. Here's something I found from a hellcat forum. The Z23 pad was also advertise as a ceramic carbon fiber.
"I'm just sharing some information I got from emailing Powerstop. I haven't used these pads yet. I'm running stock pads and I have no intention of swapping them out until the stock pads are worn out.
I emailed Powerstop asking what the difference was between the Z23 and Z26 series pads for the Hellcat.
Here is a quick summary of what they said in return.
* Z23 and Z26 use the same friction material in the pad itself
* They are both low dusting and will dust the same amount as they are the same friction material
* Backing plate shim on Z23 is rubberized and backing plate shim on Z26 is stainless steel
* The Z26 pad will tolerate higher heat due to the SS backing plate
* Both pads are low noise but I would suspect that the Z23 may be even better in the noise department due to the rubberized shim (just a guess here)
Both good choices for the Hellcat but the Z26 seems more appropriate to me and probably what I'll order if I try these over OE at my first pad replacement."
VERY interesting! Thanks for the info man, I appreciate it!
See, I was going off this chart, I'm sure they can choose to simply not mention the Z23 has carbon fiber too, they do sound like a marketing racket, LOL.
Edit: The actual description also mentions Carbon fiber with Z26 but not with Z23, so there's a chance for the Fiesta there's more than just the metal shims, but who knows... I might try them out.
Edit 2: LOL, yep the Z23 mentions carbon fiber as well, sigh.. what a mess, think I'll stick to my original plan of EBC RedStuff...