Originally Posted by
2manybikes
The answer !!!
Those pads are softer. They stop better, especially in the wet. But, being softer wears the pads more and the wheels less. This will reduce rim wear as much as anything possibly can. But you still need to check the pads once in a while. If you always ride clean dry roads, it's not much of a problem. However if you ride off road, or ride in the rain, the rims and the pads will wear faster. Nothing you can do to completely stop the wear.
I have at least five or six bikes with the Kool stop salmon pads.
I agree. Despite the difference in pad composition, I find that the pads last thousands of miles anyway - even on my commuter bike that gets ridden in the rain regularly. I rarely ride off-road, so no experience about how that affects pad life.