you will be fine. All bikes are currently manufactured to meet Euro standards because Euro are the most stringent. So in effect world bikes are over built (or over regulated if that's your preference)From my research GSR 750 (Euro model) is the same as GSX-S750 (US model)....GSR 750 came out 2011. Even though I did my research I'm still not sure if I order a GSR 750 exhaust will it fit on GSX-S750 (US Model)....GSR 750 has many choices when it comes to exhaust and fair prices.
Ordered a Yoshimura Alpha T slip on. Will report back on how she sounds.