How to re-organise prefab variants?

Hi I'm making a pool game and when I made my ball prefabs, I first made a cue ball prefab, and later created variants of that prefab for all other 15 balls.

So the variants hierarchy looks something like

 - CueBall
     - BlackBall
     - Ball1
     - Ball2
     - Ball3
     - ...
     - Ball15
 

But as things moved on I realized I often have to change small things in all my other balls (let's call them object balls), and I don't want do do this 15 times every time. One example is when I wanted to change the mass of my cue ball to 6 while setting the mass of all object balls to 5.5 I had to individually select each ball and change their mass individually

So the logical thing to do would be to have all my object balls be variants of an "object ball" variant with a hierarchy being something like

 - Ball
     - CueBall
     - ObjectBall
         - BlackBall
         - Dots
             - Ball1
             - Ball2
             - Ball3
             - ...
         - Stripes
             - Ball9
             - Ball10
             - Ball11
             - ...

However I cant quite figure out how to do this without actually having to re-create all my prefabs from scratch.

Is there a way?