PT systems have the right-side bearing pressed onto the BB spindle. The left-side bearing comes with the left BB cup. This is distinct from UT systems that have both left and right-side bearings pressed onto the two BB spindle halves and the BB cups are san bearings. Thus, as someone has stated, UT cups != PT cups.

Nevertheless, in either PT or UT, the crank and bearings are BB shell threading-agnostic. The difference lies in the BB shell interface. You can just get a PT English BB cup set and you'll be done.