South Africa beat Argentina to retain the Rugby Championship, but what did we learn about all four sides before they head to the northern hemisphere?

New Zealand beat Australia 28-14 in Perth to finish second in the Rugby Championship behind South Africa.

South Africa retained the Rugby Championship with a 29-27 win in Argentina’s ‘home’ game at Twickenham, with the Pumas’ rally coming too late

South Africa beat Argentina to retain the Rugby Championship, but what did we learn about all four sides before they head to the northern hemisphere?