Easy for me... ND. My dear departed Dad was a double domer, 2 uncles are domers, my cousin was captain of women's swim team and badly injured when their team bus crashed in early 90's... and my mom was born and raised in South Bend (my grandfather is memorialized on a statue downtown SB as a fallen fight fighter). However, I understand the contempt many here hold against ND, it doesn't bother me.
Interesting side story (for those who care). The game was always mid season, either in SoCal or at SB. However, once in the late 50s, USC piled into their train with mild weather in the forecast they did not pack any cold weather gear. By the time they arrived in SB it was bitterly cold/snow. USC asked the Irish AD to borrow some cold weather equipment (blankets, etc...) and the ND AD told them to pound sand.
So when contract can up again USC insisted that their home game in the series ALWAYS be last game of the year. That's why it is midseason at ND and end of season at USC.
Also, the current ND acceptance rate is 8% while USC is about 12-13%. Insane...