Smarts in 5 and 6mm?

Question

Mobile devices

Do you really feel the difference between a 5mm smart and a 6mm smart?

Answer 1

I don't feel.
But marketers feel.
And usually like this:

Answer 2

I can feel it when I stack phones in 30mm stacks. 5 mm in such a stack fits 6 pieces, and 6 mm - only five. :-(