I was just wondering if anybody can tell my which kind of scale is more accurate to use for weight loss. (Electronic or the old-fashioned glass dial)

My mom has an electronic scale at home. I've been using now for about a month and I went from weighing 220.8 lbs to now weighing 214.7 lbs. I went to my dads today to celebrate Father's Day and I went into my dads bathroom. He has an really old glass dial scale from his mother that she had since he was like 30 ish ( he's 62 now) and I took my weight on that and it says I'm 209.9 lbs.

So I was just wondering if I was to buy my own scale, which one would be better? and what scales are more accurate for trying to lose weight?