Depends how you measure success, on world cups, S hemisphere thump the North with just a single win this side to England and only France making a final out the rest. The English claim of superiority on this stage on the home nations but it is much closer in the 6n, autumns etc as it is between SA, AB and AS in tri nations, each hemisphere having far more exposure to each others game. I have watched every England game live since 2001 a painful journey at times with the games against Wales often the most painful to watch and lose. No idea why maybe my Welsh relatives or its just the daffodils.