The Skyteam world has a bunch of strange policies with regard to EQM/RDM.
As a NW silver elite:
1. On CO, you get 50% EQM's (cheap fares), but the full RDM (50%) bonus. You also get the EUA upgrades.
2. On DL, you get 100% EQM's, but only a 25% RDM bonus. And no upgrades.
So it's usually a toss-up for me. Fly CO and get a somewhat decent shot at an upgrade to a very good F product and a 50% bonus on RDMs, but only 50% EQM's? Or fly DL, get full EQM's, but only 25% RDM's and no chance of an upgrade.....
Then of course there are bump opps to consider (which I know are near and dear to your heart Lucky!). In my experience, I've seen NW have the most aggressive IM of the three and have been bumped on a good number of flights. I think CO is the only legacy that I've never been bumped from ever, despite being on many 'even' flights. And DL is somewhere in the middle, with much fewer personal datapoints. Of course, none come anywhere near as close to the UA model of 'if you want to give us money, we'll take it regardless of whether there's any chance we can get you a seat!'. 🙂
So I'll be interested to hear your experience.