Air Purifiers

I was looking at the Hamilton Beach website and other websites, and they have both kinds on the same website. What is the difference?

I have a neighbor who smokes very heavily and it comes straight into my room, I live in a two story house and I breathe in these fumes daily and it’s worst at night. I have two air purifiers, 1 is Holmes Hepa Air purifier, the second one is Hamilton Beach Febreeze plug in air purifier, I also use a vaporizer to help me breathe better. Anyone know a good air purifier to remove this smoke?

I’m looking for a air purifier that uses a HEPA filter, NOT an ionizer. I live in Perth, W.A. and can’t seem to find them anywhere. I’m talking about ones by brands such as Hamilton Beach. They don’t sell them at Big W, Target or Retravision. I looked on a few online stores that ship to Australia but they only sell a few cheap Ionizers

Help anyone?

I am trying to decide what machine type be best for a low to medium astma person and also another person that is allergy to grass after it cut.

Is a Hepa Filter Air Purifier the best one to get or a Ionizer.
I was planning on getting a Hamilton Beach 04491 True-Air Tower Air Purifier or the Hamilton Beach Air Ionic just needed to know which one be the best. The person is a 5 year old.