There have been 3 distinct tread patterns that I remember on T/A's. The early's were small nubs and hopeless in the wet, the next style is what most us of a certain age remember and they too were dreadful in the wet. The third design was known as EURO T/A and these were pretty good in the wet. Last I looked all T/A/s now have the EURO tread pattern but have dropped the EURO name.

Google T/A tire/tyre tread patterns and also Google T/A tire/tyre reviews.