Honestly with the Bosch it's hard to say, since they chop out work to other countries, Purolators at least have a standard build quality, All the Bosch, US, Mexico and German filters look basically the same and come in the same style box and have the crimps on the filters.
The Malaysian ones look about the same, The big thing is there part numbers don't cross with the US and other area Bosch filters.
The only good way would be to cut one open and see if it's up to par. Bosch is a lower to mid level filter to begin with but the media and parts on the inside should be about the same no matter where they are made. But the plastic on the bottom of the filter is not something that comes on anything other than something that comes out of China.
Looks more like they distribute and not produce these because the Malasian ones look identical right down to the plastic on the bottom of the filter, there is also no actual Bosch plant in South Korea it's Mann-Hummel, MANN+HUMMEL KOREA LIMITED is founded in Seoul, Korea.. There was a Merger between MANN+HUMMEL Dongwoo and MANN+HUMMEL Korea, Incorporation of MANN+HUMMEL (CHINA) CO. LTD. Which could explain the China style of the filters so to check the quality you would have to crack one open.
These filters could just be a result of cheaper labor from China but they do not appear to be the same quality of U.S and German Bosch filters so any filter rating of Bosch filters probably do not apply to these as they are not made to the same standards. Even the simple stuff like a new o-ring for your fuel filter.
I can also tell that fuel filter does not have spiral wrapped or stacked disk filter element just by looking at because you can see the filter media which just looks like pleted media like a oil filter just the other direction. Or tight wound filter media like a OEM filter or other filters like that style filter should.
Malaysian filter (note there is no Bosch facility in Malaysia that produces oil filters)
