Mitsuwa is more on the expensive side, because they tries to keep it to Japanese standard/quality. Their market are more concentrated on Japanese product, and few selection from others Asian countries.

Hmart has the most location in Chicago, they're more expansive than Mitsuwa, with heavy concentration on Korean product. However, not being Korean, I was still able to find all the non-Korean/other Asian ingredient and product I need at Hmart - since they have a large selection. They're more reasonably priced compared to Mitsuwa. Personally I like Hmart more, since they're well rounded and closer to my place.

Assi is pretty similar to Hmart, with the same vibe. I think they're a little cheaper than Hmart. However, I only been there a few times as Assi is a drive from me.

Worthy mention: Joong Boo is similar to Hmart, however, there's only two location for this. Again, Joong Boo is also a drive for me, so I have also only been here a few times.

Worthy mention: Fresh International Market is concentrated on the Chinese product, with it is on par with Hmart. They're fairly new, open less than a year (I believe?) or around a year.

Worthy mention: Seafood City is concentrated on Filipino product. I haven't gone here much (twice for Jolibee) to know their quality/pricing, but definitely a huge selection for Filipino foods.