Inter and Milan are the same in Serie A. Inter are only better above it. It's hard to predict who will win, but there might be a boring final in June. Maybe Milan are more experienced in UCL. They have a better history than Inter. But history will not affect tomorrow's Semi-final match. Because of course statistics will only strengthen the confidence of players, not make a benchmark for winning matches. The last two games of 2023 Inter have always won, even Milan could not make a goal in those two games.
Milan have many Champion League trophies than Inter Milan but last performance Inter have better with last winning tittle season 2010 than AC Milan got tittle in season 2007. Its seems Milan have waiting since more than 16 years for qualifying to semifinal stage in Champion League than Inter last achievement with treble season 2010 or 13 years ago. Difficult for predicting who favored qualify to final stage because in domestic league between Inter or Milan underperformance and difficult reach to top fourth standings in this season.
Personally I favorite with Inter Milan will success lead to final stage Champion League than Milan, have better squad than Milan is my reason why Inter have bigger chance will play in final stage.