I live in Switzerland and travel to Asia and/or Australia once or twice a year.
I have booked SQ flights for December to Australia via Singapore (economy) and will shortly book flights to South Korea and Hanoi (premium economy) with Swiss for October.
I previously used Cathay and had almost 50K miles so was getting close to being able to get something before Covid hit, I'm unlikely to use Cathay a lot in the future due to the way HK is going.
I have 7K Asia Miles and a few hundred Miles and More Points as during Covid points expired.
For my upcoming and future flights I presume I should book to either KrisFlyer or Miles & More as they're both Star Alliance?
Any reason to pick one or the other?

Sorry for the dumb question.