Just wondering if switching to the 12" rods will change the settings/angles that I have on the 10" rods.
Unless you use it in combination with something else, (like the low angle adapter, for example), no.
I have the 12 " rods and they change nothing. They just make it easier to do low angle (higher) and longer blades. Give you more range of motion.
I’ve got 14 inchers and I can state unequivocally that length of rod has no effect on angle.