Are digital scales more accurate than old school scales?

When I weigh myself on old school scale it says I weigh 69kg. When i weigh myself on the digital scale it varies in a time frame of ten minutes. One minute it says 71.5 other times it says 71.8 and just then it said 73.8. O.o
Which do I believe?
Update: ***72.8kg not 73.8kg
2 answers 2