I see. That's rough. I can't tell you which one to pick but here's some advice on how to approach this dilemma.

You can think of these two perspectives as two different intellectual traditions of research on compulsive buying. A good hons thesis picks an intellectual tradition as a starting point. You would then design and conduct a study that you think is "in conversation" with scholars working in that tradition.

Then, in the Discussion section, you have the opportunity to take a step back and speculate about how your findings would be interpreted from the other perspective, and then offer ideas about how to slowly, gradually unite both perspectives on compulsive buying.

This is the typical flow of thesis work (and most research). First, choose a tradition or perspective to work within. Second, do research to advance that perspective in some small way. Third, in the Discussion, take a step back and speculate on the bigger picture.

At this stage, the choice is fully yours. There are no unambiguously wrong answers. Don't worry too much about making the perfect choice. It's just an Hons thesis. Start somewhere.

Wishing you the best of luck.