So I thought the best relationship (beyond SkyPriority benefits which is standard via SkyTeam rules), is the DL/KLM (a result of the NW/KLM joint venture). And that these benefits were not usually on AF. KLM recognized SkyClub memberships (changed), you got benefits like you are FB equivalent. Does that happen with AF? I rarely fly them (and when booked usually disrupted by the strike of the hour).

But in generally, I've got a love/hate relationship with Delta. Sometimes they are awesome, sometimes they royally F^$@ it up and make your life miserable for nor particular reason. But I guess that's like any other relationship, especially after almost 1.5 million miles with NW/DL.

Hard to say if the grass is actually greener on the DL side until you try it. THere's always dirt under the grass on both sides!