harder pads, rotor wear higher, but less brake dust, softer pads, less rotor wear, higher brake dust. But the amount varies depending on compound type. I've used the ori nissin pads, high brake dust, but rotor looks good with almost zero wear, a little brake fade when overused, but not bad. Bendix metal king, not too bad, but hard compound, low dust, used aggresively, eats rotors, but if drive normally, shouldn't be an issue. Had to use it when I noticed my pads nearly finished in Terengganu, it was all the shop had that could fit the ek9 caliper. Was meant for honda legend never touched 50% wear, tossed the pad when it started squealing, noticed the disc was badly worn never reused, throw into garbage changed to new rotors along with new endless street pads. Ebc yellows, tried, sold before finish because friend wanted to try it, quite good, but Low dust, moderate disc wear. Endless, used twice, soft compound brake dust a lot, but not as bad as the nissin's . disc wear almost none, second set less brake dust, might be because they revised the compound, still using., my ek9 brakes actually came with race pads(according to my mech) when I bought it, red colour, dunno what brand, used it, but not so good for town driving, because effective temperature is a lot higher than normal street pads. So the pads feels kind of slippery when cold. Didn't finish, swapped to nissin pads after a month.
Prices, bendix half of nissin, nissin almost 100 bucks cheaper from endless, endless cheaper than ebc yellows more than 200 bucks. Yellows are actually race pads, but can use on the street because it works below 800deg.
The more expensive more resistant to brake fade, but you don't get this unless you've been braking constantly, like carrying old people in car down genting and braking before any corners.
If drive moderately, the bendix and nissin good enough, for more aggresive use, get higher ranked pads.