I used to have a 47 and from what I have seen, the ejectors are the only thing that distinguish it from the Model 8.
The model 8 can be a real bargain as it's just as good and nowadays (since most of us choose not to litter), maybe even a bit more practical. I have grown accustomed to holding my hand over the breech when I open my ejector gun. Extractors save me this step.