Posted By:
Rhett YeakleyTed, I haven't noticed a difference in scarcity, with these you tend to find large groups of either one type or the other (as they were sold in sets), I have never come across a set with mixed large/small font. Other than the font you can tell which set they are from by which line is first in the stamp area (assuming it hasn't been used).
Smaller Font- First Line "Unites States and Canada ONE CENT"
Larger Font- First Line "Place Stamp Here"

-Rhett