Re: Lewis/Loongze, they are definitely not the same as the ZRace/Oniiri brakes. I have 2 sets of the ZRace/Oniiri and they're completely different internally & externally. I can't speak from the Lewis units, but the Z/O's have been faultless. Their a bit of a hybrid of Hope calipers with a Diritessima & Shimano MC love child. Gave the first set a go when my SLX brakes died during the height of Covid (MC piston swole on one and the P cup got nipped by the timing port hole on the other, 4m outta warranty of course) and finding another set...