If you go with logo 44, the 'i' (and thus all the text) should probably have a different font face, or should not be capitalized. I say this because:

(a) There is ambiguity between that capital i and the lowercase l. Although the rest of the text is capitalized, it is not worth the risk potentially confusing your customers.

(b) Caterpi and Caterpl are both reasonable ways to shorten Caterpillar, so which adds to the confusion if there is typographical ambiguity.

Cheers!