To create an spline with the same size is not exact

Dear all,

I want to create an spline with the same size. I have used some ideas of the forum. But the value is not exact. It does not change much. But i want to know why there is difference. I use splinefilter as you mentioned in this forum and the subdivision of n. Why are not exactly the same the distances?

Thanks in advance

The distances i get from the spline

distance:9.98431
distance:9.95855
distance:9.92094
distance:9.97941
distance:9.89068
distance:9.89533
distance:9.89679
distance:9.95559
distance:10.0006
distance:10.0048