By nature, the Graphite Grey and Bronze options are a strong finish.
This is because of the application process.
The Cerakote finish (Stealth) is applied much like a paint (via air gun) and baked on at high temperatures for long-ish periods of time.
The Graphite/Bronze colors are applied with a system similar to ZenKote, which is a type of vapor deposition process.
I'm not 100% sure how this process works, as I've only ever had experience with the Cerakote application process.
That being said, the vapor deposition process is supposed to bond with the metal, instead of just creating a ceramic coating on the surface of the metal, like a paint.
That's what Cerakote does.
So between the two, while Cerakote IS a strong material, the VPD (vapor deposition) coatings are much stronger and longer lasting.
This is why I chose not to get a fully Stealth'd out Radius, but chose the Grey metal instead, with the rest of the Stealth options (window, buttons, black body).