"Brand" is a somewhat nebulous concept for chinese knockoffs, but the particular ones I got are each branded as "RSH Smart Tag." Though I'm pretty sure all the different listings are the same device coming out of the same factory with different random brand names printed on them. I'd just compare all the ones that say they work with iOS Find My and have wireless recharging, then get the cheapest one, specific branding be damned.

Edit: I just checked, and actually only two of my cards (which came in a two-pack) are branded with RSH, and the other one has no branding on it at all. It's definitely an identical device though - the only difference is the lack of branding.