I owned a 2018 Sierra 1500 Denali Ultimate in " White Frost Tricoat " metalic. A gorgeous color that was quite easy to maintain and never looked dirty unless after a snow storm. Owned a 1998 Sierra 1500 extended cab Z71 in Onyx black....never again. You'd finish washing waxing, detailing....go in the house to grab a beer and there'd be a coating of dust on it...
The Volcanic Red Tint Coat is stunning, don't see too many up in my area...Ontario, Canada...lots of black and white.
Have seen a few Thunderstorm Grey trucks up here, still not sure about it....would have to grow on me. Like the other person said, every manufacturer has some kind of " Thunderstorm Grey " with there own version of name...
Good luck...