I don't have a mazda, but my fusion specs the same filter - the FL910s, and I run the FL400s instead.
My decision to do this is based on a few reasons:
1- The filter is a little bit longer, and thus the filter element can hold more, and also has greater surface area. Considering the amount of space inside the filter that is taken up by the ADBV and bypass, it seems to me that an extra 3/4" of filter can actually amount to a significantly large percentage increase in filter surface (my best guess is about 33% longer filter media).
2- Larger surface area for the same amount of oil flow should equate to a lower overall differential pressure over each square cm of media. This, to me, should equate to a lower chance of failure, and a longer life/FCI.
3- From my experience, it seems that the FL400s is either the same price, or frequently even cheaper, than the FL910s.
4- This is minimal, almost negligible, since I do not over-tighten my filters, but a slightly longer filter makes for more surface to grip when I am mounting/removing the filter. Makes it a little easier.
... Keep in mind, in my engine compartment, the filter is mounted facing down, at the bottom of the engine, and the plastic engine cover does leave enough room for the filter.
I know that on some cars, going with the longer filter ends up leaving the filter sticking out, or reduces tolerance, so going to a bigger filter might not work for you.