Peugeot on Giorgio? IMO it's not much different than a Fiat on Giorgio.
DS on Giorgio? That's something completely different.
I will repeat something. I'm not convinced that PSA has better engineering team FCA. I think it's vice versa. I would even say that success of PSA is due to their aftersales and marketing team.
Their cars mechanic even on LCV is not known as sturdy. They are selling them on price.
Their infotelematics system is underdeveloped. But somehow their marketing had succeeded in convincing people how advanced they are.
Their platforms and mechanics doesn't look advanced and they are electrification game. For example they don't offer but engines, their small diesel 1.5 is more advanced that the bigger 2.0. they don't offer modular petrol/gasoline engine family not to mention 2.0 engine, no independent rear suspension on compact cars, no mechanical AWD on any car. They don't have a dedicated BEV platform or combined ICE/PHEV/BEV platform which mimics dedicated "skateboard" BEV platforms. For example their BEV products like new 208 have poorly integrated batteries which is also true for PHEVs like 3008 which has both compromised trunk and fuel tank capacity.
And so on and on...
But they are successful and above all they are profit leaders in Europe.
Chapeu to their marketing team!