Funny/bizarre anecdotal data
I always knew that my left hand is stronger than my right, in any of the standard grip positions that we usually train on the fingerboard: the half-crimp and the drag with all four fingers or with the front- and back-three respectively.
For the four finger half crimp (with the pinky in drag position) the difference usually hovers around 5% but is sometimes even greater.
Last week I had an operation on my back and to not split any stitches I was asked to do no overhead work and not lift anything heavier than 10 kg with my left (which I interpreted as 25kg). I did some training with using a small edge and a mono pocket to lift weights from the ground. This way I loaded every finger individually with fairly light weights and noticed that in the half crimp position on a somewhat shallow mono my left ring finger is at least 15% stronger than the right.
There were some tiny imbalances for the other fingers as well, but well within the error of margin I suspect.
The sum of the weight lifted with my left hand's fingers was 5% higher than the weight lifted with my left, as before but all of the difference is just down to one single finger!
I do not think this is useful knowledge to me or to anyone else, but I found it a bit mysterious and slightly amusing.
I am probably the only one.