Dane based in Beijing, so SAS Eurobonus has always been my preferred status mile. Even recently, I wouldn't mind flying between Copenhagen and Shanghai just to earn points and fully utilize the EB gold.

However, with SAS joining Skyteam I want to remain in Star Alliance since it's way better for Asia and China where I travel mostly. Airchina would be the obvious choice, but I'm honestly not the biggest fan. Since I'm flying between China and Denmark regularly thoughout the year I was considering moving to either Miles & More or Miles & Smiles since both offer an ok return trip between Beijing and Copenhagen and have some good lounges.

But I'm really having a hard time deciding between the two. Or am I overlooking a better choice?

Any inputs are welcome!