Sorry, I wasn't trying to compare units, and the whole example is a bit contrived tbh. The point was simply that in the metric system, when converting between units, all you need to do is move the decimal point, no math required.

This doesn't mean metric is more accurate over imperial, it just means that on a day-to-day, conversion is easier. Also, you can work out the relationship of units simply by their name.

deci = tenth, so decimeters means there is ten of them in one meter. deciliters means ten in one liter. so on and so forth. centi = hundred... milli = thousand...

etc.