they arent knockoffs, they are OE-replacements. Brembo isnt some niche aftermarket company with their designs getting copied. they are an OE parts supplier for many car companies. And like other OE parts supplier, once there is a sufficient market, other companies will repro the parts. its not marked as a brembo, so its not a knockoff.
the only issue here is quality, and I'm sure YMMV depending on the company who makes the repro.
those duralast units are dirt cheap. i may do a retrofit on my outback. front "brembo" calipers, rotors, and pads for under $500.