Hirudora's blunt trauma could harm the 3rd Raikage's inner body even though it can't breach his external body.
FRS is a bunch of needles which need to pierce into a body to do internal damage. Hirudora's impact would be felt inside due to its immense shock wave power.Rasenshuriken does inner body trauma and it did nothing to the Raikage.
OT: Raikage wins. Gai can't damage him and using the 7th Gate tires him out.
FRS is a bunch of needles which need to pierce into a body to do internal damage. Hirudora's impact would be felt inside due to its immense shock wave power.
Gai blitzes the Raikage and unleashes a couple of Hiru Tora after another right on his head, if even that's not enough (which I doubt) he is faster than the Raikage and has far more taijutsu skill than him, he can deflect his arm with Jigokuzuki right through the Raikage's body, like Naruto did.