An object weighing 100kg moving at a velocity of 20 m/s has a KE of 20,000J

To get the equivalent KE from an object that weighs 10kg, I've calculated a velocity of 63.25m/s

Now, here's my uncertainty: does this mean that an impact of the 100kg object moving at 20m/w would create the same amount of damage as the 10kg object moving at 63.25m/s? Assuming that the materials are the same, so the impact distance and rebound would be equivalent. Or are there other factors involved?

Thanks in advance.