Save your money. Kirkland MF from Costco do not shed any lint.
I noticed the same thing. Many of those expensive MF towels, especially the "plush" and "fluffy" ones shed a lot of lint. One of the inherent properties of really good MF is that it is lint free. That's why it is used in the optics, semiconductor clean-room and jewelry industries. I think a lot of vendors are selling sub-standard MF backed by very slick marketing.
As for country-of-origin, I don't buy any of that hype, either. It is not the country-of-origin that counts. It is the requirements put to the manufacturer and the money paid to fulfill those requirements. It has absolutely nothing to do with the country. Just look at smart phones. One of the highest quality (designed in Cupertino) is the iPhone made in China. One of the deadliest (exploding Samsung Galaxy S7) was designed in Korea and made in various countries but primarily in Korea with Korean components. Anyone who can generalize that "Made in Korea" is better than "Made in China" really doesn't know how the OEM and ODM world operates.
The easiest way to test your MF is to use a common lint roller or just plain clear adhesive or packing tape.