Sometimes , the manufacturers used to insist that one used their tyres as a matched pair since the tread pattern on the front was"designed " to help the rear tyre in some way ( such as clearing rain away). At that time, my funding decided which tyres went onto my bike.To be honest, I never ever have noticed any difference at all in tyres in dry weather. Whether using the cast iron korean tyres which came as standard with Hyosungs or the finest stickyness from pirmitchlop etc. ... I have never been fast enough.
In the wet however, I have noticed a marked difference. I currently use a Maxxi