Notre Dame, during the Stewart era, was definitely in the same league (talent-wise) as Duke was during 2003 and 2004. But putting that aside for now, the thing is you bolstered my point as to why I rank Diana Taurasi ahead of Breanna Stewart.
This is not about Stewart teams beating Taurasi teams. It is about who is the best player in UConn history and the reasons behind said selection.
UConn had far more talent during the Stewart years than during Taurasi's 2003 and 2004 seasons. In fact, UConn was the most talented team (on paper) in the country during Stewart's sophomore, junior, and senior seasons. At no time during 2003 and 2004 did UConn have the consensus most talented team (on paper); that honor fell to Duke and Tennessee. Taurasi took teams with far less talent than Stewart's teams -- and less talent than Duke or Tennessee -- and still won the national titles both years. Other than her freshman season, UConn was always the favorite to win the national title and the most talented team during the Stewart years.
Having a much better supporting cast is why I rank Stewart #2, as Taurasi's 2003 and 2004 seasons demonstrated she could do more with less, so to speak.