Welcome to FT Hugge!

With the relocation, will your flying pattern change significantly? Do you have status with SK? What airlines will you fly in the future? What do you look for in a FF program? Redemption for free flights, status, lounge access, luggage allowance?

If you can make a rough estimation of your flights for this year, you can look up on the earning tables of M&M and EB and see which one would "pay more".

As far as M&M goes, if you will fly LH a lot it's worth at least reaching FTL (*S) status, which gives you lounge access (LH group business lounges) and an extra bag. However, the main drawback of M&M is that upon redemption the surcharges are relatively high, so it only makes sense to use miles to get long-haul, premium cabin awards.