Some people have rings that are so tightly stuck that even soap does not help, but dental floss works for them. Meanwhile, others find dental floss painful even with a mildly stuck ring, yet soap works well for very tight rings. Why is some skin more sensitive to dental floss? And what makes some people’s skin respond better to either soap or dental floss?
There is a difference because you have anecdotes, not data. You can’t draw conclusions from them. The entire “experiment” could be poisoned by a single person with joint disease. It could be poisoned by a single person lying about the severity of the pain etc.