It would be helpful to know what webpage or printed reference (title/edition)you are using to ID these precancels.
That said, Chicago precancels can be a challenge for their many types.
The fact that the font is completely different and the state line has different text wording is a dead giveaway that these must be two different types.
Additionally, note that the first stamp has "bars" while the second has "lines", which is another clue, although sometimes a bit tricky if the stamp comes from the natural end of the lines at the edge of a pane:

(Take a look at type 224.)