Stock 370Z Exhaust vs Nismo - Newbie Question

[xjsman89]

Hello, everyone. I've been lurking for a while, but haven't really posted yet. Great forum, lots of info.

My wife's daily (and my once-in-a-while autocross machine) is a 2009 370Z Touring, and it's a great car. I recently had the opportunity to pick up a full low-mileage Nismo exhaust (cats and all) from another local Z owner, and I took it. I'm going to be honest, other than the "Nismo" tail pipes, I'm not really sure if there is a difference between the two systems, which is why I'm here.

I'm not scared of a wrench and will be installing this myself, but I can't seem to find anywhere where someone compares a 370Z base (or touring) exhaust to the Nismo setup. Is this because they're the same thing, or because no one really upgrades a stock 370z exhaust to Nismo?

Again, it's the wife's car, so a little more definition and a little louder would be great, but we're not interested in anything too loud, and the price was right. If it were my daily it would be a different story, but there you go.

Any insight anyone can lend would be helpful, thanks in advance!