There are a couple of aspects to consider: Legal requirements, road conditions and driving culture, price/quality of parts and conceived quality (vs the brand of the car).

Legal requirements may require certain tests to be performed and passed (e.g. braking). Suspension (and tires provided) have an influence.

Road conditions in Germany (e.g. high maximum speeds, but pretty good surface) are different from the US (bad roads, generally more relaxed driving / better distance keeping).

Parts: If the suspension is treated more poorly, it will wear out sooner. So in certain countries they may be forced to provide better but pricier parts. Bearings come to mind too.

Cheaper cars may not get any tuning. More expensive cars have the driving experience match the brand (e.g. Ferrari has a different suspension compared to BMW).