I don’t really understand this question with the way it’s worded. But I think there’s a bigger issue here: why go to UT Austin when you have a better and cheaper undergrad program at UNC? Unless there’s some program at UT Austin (for instance engineering) that is significantly better than UNC and/or doesn’t exist at UNC, you’re better off saving the money.
Also, nobody is guaranteed acceptance to UNC, even in-state students with top academics 