Ok, since I got my Scandic card in the mail today along with the member booklet and plan to stay with both chains in the future, I thought I'd do a short comparison between the programs.
Hilton <-> Scandic
Standard earnings 10 to 15 points per USD depending on status <-> Scandic 2000 to 3000 points per night depending on status
Redemptions 7500 to 40000+ points per night <-> redemptions 10000 to 30000 points per night
Point savers <-> N/A(?)
Redemption possibilities all over the world and also special merchandise etc. <-> redemptions all over Scandinavia and the Baltic and some in Belgium, the Netherlands and Germany
No
blackout dates for top two tiers <-> same
Room guarantee for top tier members when reserved 48 hours in advance <-> same
Double dipping with a variety of airlines or 50% points bonus <-> double dipping with a few Scandinavian partners, with SAS a SK flight is needed in conjunction with the stay
Rolling VIP tier qualification <-> Rolling VIP tier qualification
Silver level: 10 nights or 4 stays <-> 2nd floor: 5 nights
Gold level: 36 nights or 16 stays <-> 3rd floor: 25 nights
Diamond level: 60 nights or 28 stays <-> Top floor: 45 nights
Status valid for 14 months (?) <-> Status valid for 13 months (?)
Soft landing to lower level <-> same
Spouse stays free <-> price usually per room (?)
Usually
free breakfast for top two tiers <-> free breakfast for everyone staying at the hotel
Room upgrades up to the executive floor <-> N/A
Sporadic
access to executive lounge <-> N/A
N/A <->
Food vouchers up to the value of a main course + drink
N/A <-> 20%
restaurant discount on weekends
Welcome gift for top two tiers <-> only for highest tier
N/A <-> 50%
discount on pay TV for highest tier
Free gym/sauna/pool <-> same (for everyone staying)
Late check out <-> not guaranteed?
Sorry if I forgot some benefits. And I tried to be as objective as possible.