Obviously there is no concrete answer to this question, but we can give you some general guidelines and comparisons.
The Red Label RACE will last 15-20% longer on average, compared to a typical resin or organic brake pad. These are not designed for durability but with performance in mind.
The Gold Label HD will last typically 40% longer than our Red Label RACE (again, on a very loose average) and about as long, or in some cases even longer than a sintered metallic brake pad.
We've heard from customers who, for example, rode the entire Continental Divide Trail on their gravel bike, one one set of brake pads.
You can expect 700-1200 miles out of a set of Red Label RACE and 1000 to 2000+ miles out of a single set of Gold Label HD. *Results may vary wildly!