Obama won more of the popular vote on Super Tuesday.
Clinton won more delegates because she got the big states, so she basically won, in a sense.
However, as McCain is very popular, even though Republican supporters are much lower after the Bush Administration, he could potentially defeat Obama or Clinton in the actual election. However, I believe that Clinton can be beaten by McCain, but if Obama leads Clinton supporters will vote for him when it's just him and McCain, and that Obama will be president! >_>
That be all.