How important is it to match up sandwich tops/bottoms?

Board 8

DeepsPraw posted...
I feel like a hamburger is an example way more people can relate to

Hamburger buns are often molded so the tops/bottoms are almost exactly the same. Bagels/english muffin/etc have much more variation in the slices so it's a bit more of a difficult question.
_foolmo_
2 + 2 = 4