On shorthaul you have acces to SAS and Star Alliance partners business class lounges, assuming you do not book a codeshare flight. Boarding pass wil read "C".

Norwegian law only allow for one complimentary alcoholic beverage. Apart from that you can choose from a limited selection within the Nordics and a broader selection when flying to the rest of Europe.

Comparing longhaul Plus with shorthaul Plus does not make sense, since one is premium economy and the other is "business class".

If I were to choose I would buy a business class ticket on LH/LX/AF/KL/BA instead.