I did notice their scope and sequence is similar, but I do like the way ACSI TM is set up. With BJU we felt like we were moving so slow through the year. My dd loved the stories, but we just felt like the year dragged on in math- we lost motivation. I was constantly skipping over lessons with topics that she had already mastered and supplementing with online worksheets. Also, she came from RS so she uses some strategies that BJU doesn’t teach. While I think it is a great curriculum, I just felt it was not challenging enough for us to do it again.
I realize the way her brain figures out math will not be the same way it is taught in every math curriculum. We do still use RS, but more of a supplement- I feel there are some things it lacks using it as our main book. I was even looking into something like Abeka thinking a more spiral approach would benefit her, but I’m just so unsure!