When Which? magazine tested 100 sets of tyres - lots of different sizes and makes - it was quite hard to see a pattern. Some budget tyres were great, some dreadful, and the same with expensive brands.
Interestingly there were not many Best Buy and not many Don't Buy tyres. It's quite hard to make a tyre with good dry grip, wet grip, economy and wear rate. But one of the Don't Buys took 24m longer in the wet to slow from 50mph than the best.