Go shoot them both. Find either a friend(s) that will take you to the range with theirs, or rent. I was lucky enough to have a friend with a range membership that included free gun rentals. So I tried out all the likely suspects before I purchased my SR9c.
I hated the trigger pull and the recoil on the LC9. Having said that, everyone is different. Lots of people love theirs. That is why you should try them out.
For me the SR9c is a good compromise between a small and light enough weapon to fairly easily conceal and carry. It is also relatively fun to shoot at the range. I feel it is important to enjoy shooting a CC weapon enough so that you will actually go and shoot it enough to be proficient with it.
The LC9 would have been a chore for me to practice with. Again it depends on the individual and their likes and dislikes.
FWIW, for me the feel of the weapon in the hand, and the trigger pull were the selling points for me on the SR9c. I also tried out a Springfield, Glock and Beretta. The SR9c was the winner hands down.