What stays the same
Each return is worked out the same way: the degree Saturn held when you were born, and the days it crosses that degree again. Each has one exact pass or three, and each window is the stretch Saturn spends in your birth sign around them, between 2.1 and 3.7 years.
Your second return lands in the same sign as your first, at nearly the same degree, so the theme carries over. The difference is the years in between. Saturn describes the work, not the outcome, and by the second time you have more to look back on.
How the dates are worked out, with worked examples.