Pat Byrne seems to be on a roll after taking back control of the airline some while ago from Air France. Firstly in October they buy up Blue1 in Finland
SAS Enters into Agreements with Cityjet for Wet Lease and Sale of Blue1 | Business Wire
with 8 new Bombardier CRJ900s to be supplied, to operate as a feeder for SAS in their livery. Six weeks later they place orders for 15 Sukhoi Superjets, to replace the Avro RJs on their main network
CityJet commits to SuperJets with first due in 1Q2016 - ch-aviation.com
I suppose the surprising thing is the CRJ900 and the Sukhoi are pretty much comparable aircraft. Wonder why they got both.