they are compared here here handgunhero.com/compare/cz-p-10-c-vs-cz-p-09-c-nocturne

Hope you and your family had a wonderful Thanksgiving Christopher! The CZ P-09 C Nocturne & CZ P-10 C are both excellent 9mm pistols, but they differ in several key areas. Below is just a few comparison of their specifications:
CZ P-09 C Nocturne Design & Build:
The P-09 C Nocturne is a compact version of the full-sized CZ P-09, with a slightly shorter barrel and grip, making it easier to conceal while retaining the performance of its larger counterpart.
It has a polymer frame with ambi mag release and slide stop, making it versatile for both L & R handed users.
The "Nocturne" model features a distinctive finish (black with a darker, matte look), giving it a sleek, tactical aesthetic.
The P-09 C is optic-ready, which means it can accommodate various red dot optics with the use of an adapter plate.
CZ P-10 C Design and Build:
The P-10 C is compact with a more ergonomic design, regarded as one of the best in terms of comfort and grip.
It also has a polymer frame features a more aggressive grip texture for better control and handling, particularly in dynamic shooting situations.
The P-10 C has a more less aggressive aesthetic compared to the P-09 C Nocturne, FOCUSING ON FUNCTIONALITY OVER FORM.
I personally have shot both and decided on the P10-C for simplicity, crisper trigger pull, and love it!!
Hope this helps. Whichever you choose, choose before these holiday sales end and try to get the most bang for your buck!

Hi Christopher and welcome back. Similar dimensions but the Nocturne has a better trigger, P10c has less expensive magazines. Size comparison here: handgunhero.com/compare/cz-p-10-c-vs-cz-p-09-c-nocturne