Congrats on the 9c.
I bought the 40c a couple years ago.
Having invested no small amount of range time with it, and having since then tried a couple of 9c's belonging to a couple of other instructors, if I had to choose again ... I'd pick the 9c.
I have an equal number of 9's & .40's, though, meaning several of each. I tend to prefer 9mm, all things considered, and I'm still sort of waiting to find that "ideal" (for me) compact or subcompact .40 sometime. No hurry.
The harder I work with my .40's the better I do with my 9's.
Besides, I own and use almost as many .45's as I do 9's & .40's combined ...
I actually own more .38's & .357's than I do either 9's or .40's, too.