Different idle rpm for different market models
As I understand, according to a service manual there are different market models. (CA) California, (CN) Canada, (FR) France, (ST) Switzerland, (UK) UK and (US) U.S. models
Some of them (ST and US) should have 1000 rpm in idle and some (all others) 1300 rpm.
So, I have three questions:
1) What is the main reason for that difference?
2) Would it be wrong to run for example (CA) model on 1000 rpm instead of 1300?
3) How to tell what region model do I have? Seems like my previous owner had to mix different model parts.