what? i dnt get it e.e...Go look at edo raikage before he gets hit by the rasenshuriken. No cracks. Look at him after: cracks and smoke coming from his body. Look at him later: no cracks and no smoke coming from his body.
Look at cerebrus which was hit by naruto's rasenshuriken: no smoke after the rasenshuriken ends. No smoke.
And a rasenshuriken in KM mode has not been shown to be any stronger or weaker than a one done in base. If anything it is weaker than a sage-mode rasenshuriken.