Not much of a difference. You can still carry but magazine capacity can't be over ten rounds. But you're right it can vary by city.
Some cities have additional restrictions. Pretty sure Chicago is not the same as rest of the State.
Bill and Rainy make good points. To Rainys point, Illinois is the same way. The only state permit Illinois recognize is it's own. But multiple states recognize Illinois permit. It can get complicated. I believe it's the Utah and Arizona ccw permit that if you get you can carry in something like 40 states. You actually could get an Illinois ccw as an out of state applicant if you want to pay 300 dollars and a 6 month minimum waiting period. But in the grand scheme of things tools like a hammer, flashlight, tire thumper would do just fine.
New! Check out our help videos for a better understanding of our forum features
^ Sorry, Reginald Denny is who I meant.
https://youtu.be/NM8Y6uPH-R4