Looks like revision of the FC4, makes the shape symmetrical for both hands, removes d-pad rotation feature.
the coolest part in my opinion is how it uses Xinput for PC (is that new? i'm not sure if FC4 also did xinput).
article source:
http://game.watch.impress.co.jp/docs/news/20151107_729459.html
"Hayabusa" stick also shown
