If it helps, these are the chapters for the new syllabus version of the Fitz blue textbook:

(yr 11) further work with functions, polynomials, graphing functions, further trig identities, inverse functions, permutations and combinations, rates of change and their application

(yr 12) trigonometric equations, proof by mathematical induction, vectors in two dimensions, applications of calculus, differential equations, motion forces and projectiles, the binomial distribution

If the topics are different, it is best to buy a new textbook for the new syllabus if you are doing the HSC for 2020 and beyond.

My school has been using the Fitz textbooks since that was available at the start of the year. Maths in Focus textbooks were published a few weeks ago and I'm still new at using the book. I'm sure Cambridge also published recently so I haven't used their textbook yet.

I'm not sure if it with other textbooks, but the Fitz textbook has some errors in the questions without worked solutions (even numbered questions may have errors). It's probably due to how quickly they had to publish. My class and teacher found 3 errors out of all of the yr 11 chapters. I would suggest using photomath or some other app to double check the answers.