Only used koolstop salmons so can't comment. They were always great for wet use but did wear pretty quick, marginal additional wet braking performance on alloy rims over the shimano pads which generally had 2x the life. Cheaper pads were always loads worse than both of them! I came to prefer the shimanos.
One for you @Steedie : https://roadcyclinguk.com/gear/gear...-28mm-tyre-clearance.html#k3vZy2tPwVBJqft4.97
One for you @Steedie : https://roadcyclinguk.com/gear/gear...-28mm-tyre-clearance.html#k3vZy2tPwVBJqft4.97