I will be CO Platinum as soon as they credit my AF flights from Oct. (don't know what's taking CO so long). I'm planning a trip on DL next April using SkyMiles. Thinking about trying to get NW to status match Platinum. 3 questions:

1) Will NW status match CO since currently same alliance?
2) DL says it waives baggage fees for Medallion but not partners. What about NW since not merely a partner?
3) DL will waive $100 change/redeposit fee on award ticket for its own platinum members. Would they do it for NW?

Since the general comment in this thread is that DL wouldn't match Platinum for Platinum, matching to NW would be great if it gives me 1, 2 and 3. Otherwise, maybe I should just go for DL's middle tier (if they will match CO) and get 2 but not 3.

By the way, anyone know if DL waives baggage fees for Medallion only or also traveling companions? CO's website is explicit that it applies to everyone on same itinerary but unclear from DL.

Last question, although a bit unrelated -- I'm hoping to book my family's DL award tickets from both my wife's and my accounts (to use up her miles since she doesn't travel much on them). But I presume that that would mean that if we needed to change or redeposit, we'd have to pay two $100 fees since they would be from two accounts. Anyone know if there's a way to solve that?

Thanks.