Hello, there are indeed some changes.
- reinforced car body
- different shape of the black trim what is left and right from windshield to reduce wind noise
- better soundproofing (2mm layer -> 3mm layer)
- front bumper has a different shaped (smaller) under-spoiler
- [not sure] different angle of (at least one) pedal (don't know which one it may be)
- [not sure] improved steering and suspension
- [not sure] some engine modifications
I got my information from this japenese brochure. I do not speak japanese, so I can only guess some of the changes, which I claimed with [not sure]. Sorry for my bad english, I am from Germany.
https://www.honda.co.jp/factbook/auto/fit/201706/FIT_201706.pdf