I used them for image guidance.
had a marbel struck going 70MPH
the ball would be dented and reflex back out and displace.
the frisbee might shatter or just have a hole blown straight through.
but since i used them as examples it is hard to say how this would work on a planetary/diskus scale.
since one has a mass that is disputed (round) and one unknown (disk), no can say for sure what the effects would be had on these models.
does that satisfy you?