Its a bit to early in the Winter to start compairing frame sizes and systems
An otherwises infected debate to warm the blood of beekeepers in the dark Cold Winter, like cabin fever for beekeepers that are missing there bees and waiting for cleansing flights.
In Sweden we have much too many frame sizes too choose from.
If your Norwegian frames are the same or similar to " LN lågnormal Low normal frames" there is a 13 frame box that is the same size as Langstroth boxes, if you want to convert your beekeeping in a converting faze.
The Swedish distributor http://jarbobiodlarservice.my123eshop.com/product.html/combi/nacka-sarg?category_id=1
The 13 frame box has the same outer dimensions as a langstroth box. The 13 frame box is a flat pack that you put together from 4 pieces and a Little glue.
It could be an alternative if you don't find a buyer for your bees or cant buy bees in the langstroth size.
ask more questions if there is something you wonder about.