Here is a list of new cabins according to this thread and my recent flights.

Feel free to add more tail numbers

OH-LKH
OH-LKK
OH-LKN
OH-LKO
OH-LKP
OH-LKR



Didnt really enjoyed new seats on 3 hours flight. 😁 Seats were just too hard, it was short and back was hurting already after a while.. In addition, temperature varied a lot in every flight. In the beginning it might be freezing cold and then 15mins later it’s a way too hot. Didn’t remember similar cases with airbuses.