The lower offset will stick out farther. It should clear the brakes, fitment can be tricky with 4/6 pot calipers but the factory side pushers typically don’t cause any issues as long as you are not going below a 17.
The 19 Forester and Outback have the same exact bolt pattern of 5x114.3. The Legacy, Ascent and WRX also have this same bolt pattern. The wheels will fit, but will sit farther inside the fender due to the higher offset.
I found an outback snow tire setup on my local craigslist that I'm interested in. Wondering the ever so slightly bigger tire size for an outback would work on my 2019 Forester Sport. 225/60/r18 on 18x7.5 wheels with 42mm offset.