Hepa vs. Non-Hepa air filter?

I’m thinking of buying an air filter for my bedroom. I have a slight allergy to dust mites, which causes nasal congestion, but that’s it. I’m not that concerned with super-bacterial removal or anything.

So basically I want to get rid of dust mites, and help keep my air unscented because I share an apartment with a smoker.

I saw 2 Hamilton Beach filters for a good price, Hepa and non-Hepa. The Hepa is supposed to be better but it’s filters are expensive.

Would the non-Hepa filter be good enough for me, or should I just go for the Hepa?

Thanks.