Muffler fitment

Will all the exhaust systems that fit the Z650 also fit the RS? How about the Ninja 650? will they be essentially the same? The reason I ask is because I don't want to have to return anything if it doesn't fit right. I want to order it from MOTOSTORM. It's the one for a Ninja 650 2021 to 2022. It's made by MIVV and I have had one of their exhausts before and I really liked it. Wasn't to loud. It's the black oval carbon system. Any advice or feedback would be greatly appreciated.