Differences: Subjekt is LF Premier is HL.
Subjekt is light Premier is heavier
I ride the subjekt and love it. A lot of people don't. It's a love-hate thing, but this is one of the more underrated LF boards. A lot of people like the premier because it is very mellow 3 stage and is more like a continuous board. If you want to learn better basics, get a subjekt. It forces you to do things right, which will improve your riding tremendously.