OK, I know this is slightly off topic, but just to be clear (and pedantic) - I wasn't trying to make a comparison of high performance cars on high performance tyres. The tyre test was performed by people that perform these tests day in day out, they attempted a motorway simulation whereby they got up to 70mph on a controlled 1mm depth of water then applied the brakes as in an emergency braking situation (foot full down on the brakes, clutch in) leaving the car (I think it was a Ford Focus or similar) and abs to do the work. It would be interesting to see a full set of test results at different speeds and in different driving conditions, I suspect the results would largely be similar - budget tyres will not perform as well as branded.
To me this is a real world test and was repeatable, this type of braking situation could mean the difference between life and death, the budget tyres did not perform as well as the branded product. With tyres being a safety feature of vehicles, I know where my money will be going.
My point which is on topic is that this could be applied as a general rule for unbranded copies for all sorts of products, but as I stated in my OP the Chinese appear to have upped their game over the years to make higher quality copies.