You'll probably get more answers in the CO forum than here. Perhaps the mods can move the thread?

But in general EQM earnings for codeshares are based on the underlying fare class on the operating carrier. So regardless of whether the flight is coded with a NW or KL flight number, if it posts to CO as a KL B fare, you'll only get 100% EQMs. You could always buy it as a NW B fare, however, and then write to CO if it only posts as 100% and try to get 150%. But odds aren't good.