I don’t know what the paid version is. Maybe it’s a premiun version of Among Us? Or it’s only to pay for the developer? I won’t buy the paid version.
The paid version is not premium in any way, it's the exact same thing on Android and iOS. But, if you like privacy and have money to spend go with the PC version a.k.a the paid version but if you're not concerned about your privacy online, don't care about ads and on a budget then go with the mobile version, the one for Android and iOS.