I haven't done the experiment yet. However, I predict that the outcome would be...both made an impact, but the impact from the kubotan would be smaller, more focused, and much deeper
I 've carried a Kubotan for years when my MA skills were in their infancy stage..As a bouncer I put a "hurtin" on a couple of bruisers striking with the end of the Kubotan into a "pec"..Then as well as now I perfer to use it as a control device...