It really does seem that the same ACC regular season title curse that Duke has, UNC has the same ACCT Title curse.
From 2009 to 2024, UNC has won the ACCT once. Going 1-6 in the title game. Duke on the other hand has 6 ACCT titles, going 6-2 in the title game.
Conversely, over the same span, UNC has won the ACC regular season 6 times (5 outright and 1 tie), and Duke has won it just twice (1 outright and 1 tie).
Both teams have pulled the double dip winning both the same year once, Duke in 2010, and UNC in 2016, and 4 times they have split, all four times it was UNC regular season and Duke ACCT.
Another interesting tidbit that is UVA is second over that span in both categories, they have 6 regular season titles (4 outright and 2 ties) and 2 ACCT titles. But they pulled the double dip twice.