Of course a Peugeot 508 is not the same as an Alfa Giulia. But Alfa needs a FWD/AWD car based on the 508 in addition to the Giulia. Dodge needs a Challenger Coupe / Gran Coupe on Giorgio Global in addition to a FWD/AWD car based on the 508. So there is complete overlap between the brands except for the top of the line TTV6 vs Hemi V8.It is exactly the same thinking that you have that led me to a conclusion opposite to yours.
A Peugeot 508 is not the same as an Alfa Romeo Giulia.
If you think otherwise, you are wrong.