Generally, the bun on the top is thicker, so it absorbs the sauce well, so it is less spilled, and it is easier to eat it in a circular manner without collapsing.
The reason why you should eat the hamburger upside down.
Generally, the bun on the top is thicker, so it absorbs the sauce well, so it is less spilled, and it is easier to eat it in a circular manner without collapsing.