so it's 18mm longer while being 6mm narrower. At that small a difference, I would assume that a preference of one over the other is similar to that of metric vs. imperial - the one you were raised on just seems right.
I grew up with the A sizes of paper and agree with the parent comment. When I moved to the US I was pleasantly surprised by the size/shape of US Letter sized paper.
It's just that you can resize everything while still keeping the same portions with the A* paper while with the US formats you just have to redesign everything.
> US Letter: 216 mm x 279 mm
> A4: 210 mm × 297 mm
so it's 18mm longer while being 6mm narrower. At that small a difference, I would assume that a preference of one over the other is similar to that of metric vs. imperial - the one you were raised on just seems right.
Which one did you grow up with?