For an '01S (had one) the only difference is the length of the pigtails. I cross reference listing the Bosch part numbers to the Porsche part numbers is
here. Prices and where to buy in that article are about 5 years old. But the part numbers should still be good. Use the Bosch parts with pigtails installed and tested at the factory. Not cheap brands nor soldered connections.
Replaced both of my upstream sensors with the Bosch parts. Any muffler shop should do it for about 1/2 hour of labor if you bring in the part. You'll then have to get the CEL reset but almost any OBD2 reader will do that. I used an Actron.