OK, thanks that explains it.
For $50 US, I can deal with the dust. The Carbotech 1521s apparently don’t have the dusting but then they are over $300.
This may be an apples to oranges comparison--are you finding that the Carbotech 1521 pad for stock G8 (FMSI D1351) is $300+? I'm waiting for a response from CT to confirm pricing. It's easy to understand that there are a broad range of pad options at many price points, and, as you indicate, it's not a difficult choice to deal with the potential downside(s) of a less costly option.
The Brembo application pads in the 1521 variant are under $200, per info here--this is for Brembo caliper fitment:
as shown here for Carbotech. Spec 1521 is the "Bobcat" friction formulation, their lowest grade offered.
Carbotech Performance Brakes: Products-Brembo Calipers Brake Pads & Shoes
EVO VIII/IX/X, CTS-V Caliper
- .630"/16mm B: CT1001A
Gran Turismo Large 4-piston
Carbotech Performance Brakes: Products-Pontiac Brake Pads & Shoes
G8 GXP - Brembo Calipers F: CT1001 (2009)
Carbotech Performance Brakes: Products-Cadillac Brake Pads & Shoes
CTS-V Brembo 4-piston Caliper F: CT1001A (2004-2007)
What I cannot answer about the Carbotech listings above is the difference in D1001 & D1001A. It appears that D1001A is thicker, but correct spec pad for D1001 is 0.585", to my knowledge, and D1001A is 0.630". This is a question to inquire directly with Carbotech before making a purchase decision.