TBH after a while I optimized things around robovac, or tidiness levels. I have hardwood floors, woven carpets, just stuff where vacs pick thing sup very effectively.

I don't know if Chinese ones are any better in terms of performance, suction levels only matter when you're on carpet and then it heavily depends how worn out or well maintained your brush head is which is where cheap consumables start to matter. For me the easy surfaces get 80%+ clean, the harder surfaces get 50% but even with very highend vaccuums I can still scrapes tons of hair out with a fur brush. But part of it is also I have a ancient magic high performance furbrush (random plastic junk for 30 years ago) that somehow digs out more fur than any other brush.