Lots of posts - active member :)
Injectors need to be matched to your engine (generation) and/or mondifications. So what generation 3sge engine do you have and match the injectors to that unless major modifications.
Getting injectors off another generation may highly likely have a different flow rate that can impact air/fuel ratio (performance, engine life, and fuel economy). If they are an aftermarket injector that you are looking at they could be a different impedance so would need an aftermarket ecu or modification to run them.
The biggest aspect, all injectors need to be serviced together - cleaned to ensure atomisation / spray patterns and biggest flow checked that all are running the same injection flow.