WereKitten on 28 May 2009
^There's no profound difference, because there's no profound sense in the terms you're using.
Outselling as in what? Overtracking? Sales per week? Total sales?
Generation rival as in what? When will this generation end?
They are all conventions, often used in poor data analysis and for use in ego boosting, don't put more semantic weight on their frail shoulders. They can't carry it.
