Dont buy tht a400. By right never ever buy a super low end ssd from kingston. Somewhre in year 2014 , kingston used to have a low end model call V300.  Different batch get different type of NAND chips. Performance difference are significant.

Kingston themselves dont manufacture NAND chips , RAM and the SSD controller. They only assemble them. Bill of materials wise they just buy watever is available on the market that is cheap for the low end segment. Kingston is more like an assembly company.

Crucial on the other hand belongs to Micron. They produce their own NAND chips and RAM. They only buy the SSD controller from 3rd party. Their product QC is good because of this. Thts y i also recommend to buy MX500 if cheap ssd is all you want. Never go below that.

For the entire SSD industry, only Samsung produce everything by themselves . NAND chips, RAM and SSD controller. QC is top of the line. Of coz here you pay through your nose for a Samsung SSD.

Those are rebadged. Not only Kingston does that, even Apacer and Kingmax do that. Still these companies do not manufacture their own RAM chips themselves.