Maybe. Maybe not. Rotors are pretty simple and hard to fuck up the metallurgy on, they’re the one thing I don’t actually mind going cheaper on. It’s not like you’re buying OEM carbon ceramic rotors for your Lamborghini.

The biggest issue with cheaper rotors is poor runout tolerance (how flat they are). Sometimes you get a wiggly one and it’ll have poor performance 'cause the pad doesn’t make full contact, plus makes your car vibrate weird when you stop. They can be turned down backnto flat by a shop though, or just warrantied.