Playing with the v3 score algorithm it is easy to arrive at an expression for the ratio between the numbers of votes based on different vote levels giving the same score.

To get the same score with all 9/10 votes as for all 10/10 votes 29% more votes are needed.

To get the same score with all 6/10 votes as for all 10/10 votes 9 times more votes are needed.

Etc.

------10-----9-----8-----7----6--

10-- 1.00 1.29 1.80 3.00 9.00

9--- 0.78 1.00 1.40 2.33 7.00

8--- 0.56 0.71 1.00 1.67 5.00

7--- 0.33 0.43 0.60 1.00 3.00

6--- 0.11 0.14 0.20 0.33 1.00